I would like to request the deletion of artist #160427 (deviantartmissusruin). I made it when I noticed the "Create artist" link while uploading. I checked the autoloaded URLs which were fine, but missed the error in the name field. Had I noticed that error before hitting submit, a short press on backspace would have been the end of it.
I started two other uploads using the upload bookmarklet to try and replicate the issue.
Deviantart accounts get the deviantart- suffix if created using that link. The "Other names" seems to be the right name.
Pixiv accounts seem to be working fine. Got a "Other names" suggestion whose correctness I can't confirm.
In light of this small test I think this might be a bug. I always use artist:whatsitsname and then proceed to edit the new entry so I didn't notice this before.