Scroll to the very bottom of the page - on the left side there will be a dropdown menu that says Bethsda Softworks. Click it to change the theme.
To get rid of notifications, simply click the arrow next to the number. It only seems to work within threads, though.
Thanks. I.P looked too plain though, so I'll just stick to this one.

Oh and I finally cleared my notifications! :celebration:
There all equally bad.

As for the OP, I encountered the bug as well. When I went back to my Quest Log, I noticed the "Tutorial" Quest had not been completed. After a quick run-through of the basic features, I unlocked a bunch of new options, like the ability to change my username and to ban certain users. Quite fun.
When I resumed the quest, the bug was gone. Try doing what I did.

Yeah, the tutorial quest is the one I was referring to. I believe the more stars you have, the more power you have too. OP, if you're having trouble with it, just pull out an FAQ from the web. They're really helpful. I couldn't finish my last quest without it. :facepalm: