Also, checking https://en.wikipedia.org/wiki/Special:Watchlist does not display these non-existent edits nor does the page history of the individual articles and categories mentioned.

Recent changes for this article (according to toolserver.org):

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For what it's worth, I just caught a live one showing up in my Special:Watchlist Atom feed and then checked against Special:RecentChanges on en.wp:

At 1:23, my watchlist claims that User:Andreasmperu edited Superman (The Clique song).

Here is a copy-and-paste from every edit that happened from 1:23:00 to 1:23:59:

(diff | hist) . . Begusarai district‎; 01:23:59 . . (+19)‎ . . ‎101.62.52.201 (talk)‎ (→‎Education)
(diff | hist) . . Wikipedia:WikiProject Guild of Copy Editors/Backlog elimination drives/July 2013‎; 01:23:58 . . (+59)‎ . . ‎JudyCS (talk | contribs)‎ (→‎JudyCS (talk): updated totals)
(diff | hist) . . Kojak‎; 01:23:57 . . (+14)‎ . . ‎71.180.138.175 (talk)‎ (→‎Plot) [rollback]
(diff | hist) . . N User:TinyURLDotComSlashMb4tstl‎; 01:23:55 . . (+27)‎ . . ‎Prolog (talk | contribs)‎ (blockedsock)
(diff | hist) . . N! User:Djdubay/sandbox/Userbox/Project‎; 01:23:53 . . (+802)‎ . . ‎Djdubay (talk | contribs)‎ (Creating new sandbox subpage.)
(diff | hist) . . Wikipedia:WikiProject Military history/Fortifications task force/Popular pages‎; 01:23:52 . . (-30)‎ . . ‎Mr.Z-bot (talk | contribs)‎ (Popularity stats for WikiProject Military history/Fortifications task force) [rollback]
(diff | hist) . . User:DGG/CSD log‎; 01:23:51 . . (+166)‎ . . ‎DGG (talk | contribs)‎ (Logging speedy deletion nomination of Wikipedia talk:Articles for creation/TPRG KANGAROO BRAND. (TW])) [rollback]
(diff | hist) . . Margareta Huitfeldt‎; 01:23:49 . . (+66)‎ . . ‎Aciram (talk | contribs)‎ (→‎References) [rollback]
(diff | hist) . . m Stella Women’s Academy, High School Division Class C3‎; 01:23:47 . . (+20)‎ . . ‎Xezbeth (talk | contribs)‎ (Disambiguated: Rambo → Rambo (film series)) [rollback]
(diff | hist) . . N. T. Rama Rao Jr.‎; 01:23:47 . . (-12)‎ . . ‎117.241.0.199 (talk)‎ (→‎As actor) [rollback]
(User creation log); 01:23:45 . . User account Thundercatmd (talk | contribs) was created ‎
(diff | hist) . . Sadabad, India‎; 01:23:45 . . (+77)‎ . . ‎117.243.196.54 (talk)‎ (→‎Education) [rollback]
(diff | hist) . . Crestar Bank‎; 01:23:42 . . (0)‎ . . ‎173.71.136.155 (talk)‎
(diff | hist) . . Template:Did you know nominations/Russian submarine K-18 Karelia‎; 01:23:40 . . (+350)‎ . . ‎Daniel Case (talk | contribs)‎ (dull hook) [rollback]
(diff | hist) . . Aubrey Plaza‎; 01:23:40 . . (+46)‎ . . ‎Captain Assassin! (talk | contribs)‎ (Life After Beth) [rollback]
(diff | hist) . . WVQS-LD‎; 01:23:39 . . (-1)‎ . . ‎142.255.235.18 (talk)‎ [rollback]
(User creation log); 01:23:39 . . User account Reginawong71 (talk | contribs) was created ‎
(diff | hist) . . Wikipedia:Categories for discussion/Log/2013 July 9‎; 01:23:38 . . (+312)‎ . . ‎DexDor (talk | contribs)‎ (→‎Category:Modern surface-to-air missiles: cmt) [rollback]
(diff | hist) . . Richard Lee McNair‎; 01:23:37 . . (0)‎ . . ‎Download (talk | contribs)‎ (→‎Attempts to avoid recapture: caps)
(diff | hist) . . Wikipedia:WikiProject Motorcycling/Popular pages‎; 01:23:36 . . (+2)‎ . . ‎Mr.Z-bot (talk | contribs)‎ (Popularity stats for WikiProject Motorcycling) [rollback]
(diff | hist) . . User:Aghaz Tech Systems‎; 01:23:35 . . (+16)‎ . . ‎I am One of Many (talk | contribs)‎ (Requesting speedy deletion (CSD G11). (TW)) [rollback]
(diff | hist) . . Akkineni Nageswara Rao‎; 01:23:34 . . (-12)‎ . . ‎DMacks (talk | contribs)‎ (MOS) [rollback]
(diff | hist) . . Prince William, Duke of Cambridge‎; 01:23:33 . . (+400)‎ . . ‎71.167.157.25 (talk)‎ (→‎Royal duties: tidies) [rollback]
(diff | hist) . . User talk:Praghadeshkar‎; 01:23:32 . . (+1,977)‎ . . ‎DGG (talk | contribs)‎ (Notification: speedy deletion nomination of Wikipedia talk:Articles for creation/TPRG KANGAROO BRAND. (TW])) [rollback]
(diff | hist) . . N! Wikipedia:Articles for creation/RJ Sridharan‎; 01:23:32 . . (+5,171)‎ . . ‎Anandhi1212 (talk | contribs)‎ (←Created page with ''''RJ Sridharan''' Rajendram Jagannathan Sridharan, affectionately addressed as Com RJS by the Indian banking fraternity was born on April 9th, 1949. He was bor...')
(diff | hist) . . Seoul Metropolitan Police Agency‎; 01:23:30 . . (+95)‎ . . ‎Howard61313 (talk | contribs)‎ [rollback]
(diff | hist) . . Wikipedia talk:Articles for creation/TPRG KANGAROO BRAND‎; 01:23:30 . . (+12)‎ . . ‎DGG (talk | contribs)‎ (Requesting speedy deletion (CSD G11). (TW])) [rollback]
(diff | hist) . . Gabrielle Union‎; 01:23:29 . . (-3)‎ . . ‎Monkelese (talk | contribs)‎ [rollback]
(diff | hist) . . Kashmere Stage Band‎; 01:23:28 . . (-57)‎ . . ‎107.196.30.182 (talk)‎ (→‎History) [rollback]
(Article Feedback Activity Log); 01:23:28 . . 122.178.233.254 (talk) submitted feedback post #050027e... on Dhanush ‎(i am happy to be a fan of dhanush)
(diff | hist) . . Fahadh Faasil‎; 01:23:28 . . (+103)‎ . . ‎92.97.8.139 (talk)‎ (→‎Filmography)
(diff | hist) . . m Waldemar Klingelhöfer‎; 01:23:24 . . (-1)‎ . . ‎Robert4565 (talk | contribs)‎ (Tag: VisualEditor) [rollback]
(diff | hist) . . m Maiden's Tower‎; 01:23:23 . . (+3)‎ . . ‎Thewolfchild (talk | contribs)‎ (→‎Legend) [rollback]
(diff | hist) . . Ball State University‎; 01:23:23 . . (-276)‎ . . ‎184.17.231.231 (talk)‎ (removed Points of interest section → all places are listed in Ball State navigation box and/or are mentioned throughout the article) (Tag: section blanking) [rollback]
(diff | hist) . . m Adas Israel Congregation (Washington, D.C.)‎; 01:23:21 . . (+37)‎ . . ‎Bizzurp (talk | contribs)‎ (Category:Conservative synagogues) [rollback]
(diff | hist) . . Wikipedia:WikiProject Arthropods/Popular pages‎; 01:23:21 . . (+12)‎ . . ‎Mr.Z-bot (talk | contribs)‎ (Popularity stats for WikiProject Arthropods) [rollback]
(diff | hist) . . Animethon‎; 01:23:19 . . (-103)‎ . . ‎Ceasol (talk | contribs)‎ (Animethon has become largest Anime Convention with an attendance in 2012 of 6404 against Anime Revolution with 5233) (Tag: VisualEditor) [rollback]
(diff | hist) . . Talk:Sex at Dawn‎; 01:23:17 . . (+245)‎ . . ‎NorthBySouthBaranof (talk | contribs)‎ (→‎Removal of Ellsworth's "Sex at Dusk" review)
(diff | hist) . . N! User:MOTOI Kenkichi/北乃カムイ‎; 01:23:17 . . (+5,636)‎ . . ‎MOTOI Kenkichi (talk | contribs)‎ (翻訳用テンプレ)
(diff | hist) . . m William Fulton (urban planner)‎; 01:23:16 . . (+4)‎ . . ‎Billfulton00 (talk | contribs)‎ (Tag: VisualEditor) [rollback]
(Protection log); 01:23:16 . . Prolog (talk | contribs) protected Patient Protection and Affordable Care Act‎ ‎[edit=autoconfirmed] (expires 05:23, 30 July 2013 (UTC)) ‎[move=autoconfirmed] (expires 05:23, 30 July 2013 (UTC)) ‎(Persistent sock puppetry)
(diff | hist) . . Barbro Eriksdotter (Bielke)‎; 01:23:14 . . (+32)‎ . . ‎Aciram (talk | contribs)‎ (→‎Sources) [rollback]
(diff | hist) . . Ohio State Route 357‎; 01:23:14 . . (+94)‎ . . ‎CycloneIsaac (talk | contribs)‎ (→‎References: separate) [rollback]
(diff | hist) . . Gwangju FC‎; 01:23:12 . . (+69)‎ . . ‎Z4617925 (talk | contribs)‎ (→‎Current squad) [rollback]
(diff | hist) . . N Talk:Lavender Country‎; 01:23:12 . . (+419)‎ . . ‎Bearcat (talk | contribs)‎ (←Created page with '{{Old AfD|Lavender Country|delete}} ==Prior AFD== Please note that this version of the article is significantly expanded, and its sourcing significant...')
(diff | hist) . . Argentine legislative election, 2013‎; 01:23:12 . . (-59)‎ . . ‎186.61.49.196 (talk)‎
(diff | hist) . . Brian Nieves‎; 01:23:08 . . (+14)‎ . . ‎PaulinSaudi (talk | contribs)‎ (fix many capitals) [rollback]
(diff | hist) . . SeaWorld Entertainment‎; 01:23:07 . . (+17)‎ . . ‎67.238.188.192 (talk)‎ (Tag: VisualEditor) [rollback]
(diff | hist) . . British Expedition to Abyssinia‎; 01:23:05 . . (+7)‎ . . ‎Reenem (talk | contribs)‎ (→‎The campaign) [rollback]
(User creation log); 01:23:04 . . User account Rblak87 (talk | contribs) was created ‎
(diff | hist) . . Arunachal Pradesh‎; 01:23:04 . . (-1,141)‎ . . ‎BijoyChakrabarty (talk | contribs)‎ (Undid revision 565431133 by Qwyrxian (talk) Hindi is not official language in Arunachal pradesh, it's English. Official Gov cite provided) [rollback]
(diff | hist) . . Wikipedia:WikiProject Solar System/Popular pages‎; 01:23:03 . . (-17)‎ . . ‎Mr.Z-bot (talk | contribs)‎ (Popularity stats for WikiProject Solar System) [rollback]
(diff | hist) . . Wikipedia:Huggle/Users‎; 01:23:03 . . (+38)‎ . . ‎Czar (talk | contribs)‎ (Adding czar (HG)) [rollback]
(User creation log); 01:23:01 . . User account Huskers3155 (talk | contribs) was created ‎
(diff | hist) . . m Southern Cross All-Stars‎; 01:23:01 . . (+31)‎ . . ‎Loudestpenguin (talk | contribs)‎ (Tag: VisualEditor)
(diff | hist) . . Talk:List of tallest buildings in Christchurch‎; 01:23:00 . . (+282)‎ . . ‎Grutness (talk | contribs)‎ (→‎Minimum height)

Problem solved? This user edited d:Q3977961 (several times in a row: https://www.wikidata.org/w/index.php?title=Q3977961&diff=60842173&oldid=37167299 ). Evidently, related items from Wikidata cause these phantom changes to occur...

Core should exclude RC_EXTERNAL by default for feeds or the extension has to provide a feed formatter for that row, but should also respect the setting, that external not always include in the result.

You can use wltype=edit|new|log to exclude the external edits.

This seems fixed now for me.