For your first question just make sure you're typing your password in rig-... I'm kidding :3 but seriously are you trying to log in through the gold box at the top right? That could be why you're having trouble. I believe there's some kind of glitch with that gold box log in so if anything just log in directly to the forum in the smaller log in boxes that pop up on the left when you click "forum".
As for you second question is this what you're talking about?
If so I had the same problem a while back and sometimes it happens to me randomly. If you're using Internet Explorer try switching out of compatibility mode. If that doesn't work for you log out the forum and clear out your cache then close the window and reopen the window back to the forum. You could also try using a different browser. Usually this problem sorts itself out though.
Hope that helps