During T178715 we found some inconsistencies to how the [[ https://www.mediawiki.org/wiki/API:Usercontribs | Usercontribs ]] API orders things when there are multiple users.
If you look at a query like this:
https://en.wikipedia.org/w/api.php?action=query&list=usercontribs&ucuser=Davidwbarratt|Kaldari&uclimit=500&ucdir=older
I would expect Kaldari's edits to be almost all of the results, however, this results is in there:
```
{
"userid": 15989147,
"user": "Davidwbarratt",
"pageid": 2212828,
"revid": 468108124,
"parentid": 429907077,
"ns": 0,
"title": "Palmer Theological Seminary",
"timestamp": "2011-12-28T16:46:01Z",
"comment": "",
"size": 6288
}
```
`Kaldari` has many many many more edits that are newer than this.
However, if you reverse the query:
https://en.wikipedia.org/w/api.php?action=query&list=usercontribs&ucuser=Davidwbarratt|Kaldari&uclimit=500&ucdir=newer
you do not get any results from `Davidwbarratt` which is what I would expect.
What is going on here? I thought at first it was running two different queries and then stacking the results, but then the reverse would not have had the same effect.
I expected the query to be run with multiple users, something like `IN ('Davidwbarratt', 'Kaldari')`, but that does not seem to be what is happening.
If we can't resolve this, I think it might be better to not support more than one user in a query.