Open this link and inspect any collapsed lines.
- 22:24 Category:Midtown Manhattan (2 changes) . . [ Ser Amantio di Nicolao (2×) ]
Notice "22:23" on the third line is linked here, with curid=9288855, which is for 3 Park Avenue, not Lexington Avenue. In any group of category changes, the curid for the page on the first line is mistakenly being used on all the rest of the collapsed lines.
Though this can't be reproduced in markup here, the title attributes (tooltips) of the timestamps are also wrong: they're set to the name of the category, not the linked pages themselves.