Right, it would normally return both The Pharmacist and The Sceptical Chymist.

I just pushed an update and now you can search with the user id, returning the most recent username (in this case, The Sceptical Chymist). If you search for The Pharmacist, it leads you to the same ID page where you can see the data for that user regardless of any name change: https://beta.ninjastic.space/user/id/487418