I'm really annoyed with Deviantart, a couple of months back I started having trouble deleting the notices of new art/submissions, I checked all my settings, ran adware, and virus protection stuff and nothing. I contacted Devianart, and they basically came to the conclusion it was "on my end," even after trying on two computers, and two different internet connections. Still "my end."
Yeah, uh. Then they changed some things and did their alleged simplification of the notice system. No problem since then, until today. Which makes me suspect they've changed something, then changed it back. (I had the problem on both Firefox AND Chrome, by the way...which makes me double down on my belief its on THEIR end)