Is there a way to completely clear my profile, boxes and all? I ask this because I want to completely redesign it, and I do that best with a completely blank slate, and some stuff is also stuck.

Preferences / Profile. There's a link that says Reset V2 Profile.

I tried that several times, and it didn't work.

Hmm. The only other thing I can think of is going through your profile on the Edit page and deleting the content boxes one by one. :(

The same thing happened to me as well, so I filed a ticket and a UA cleared everything for me. c:

Thanks Doodlepaw❤ I'll go file a ticket.