think this is visual bug in Firefox 53.0.3 (but fine in Internet explorer 11). But seems it helps if page is refreshed once or twice.
this was part of the bug where the last post since you visit was shifted upwards for random reason (fixed)
css could be a real bitch sometimes
I stopped being able to see my messages and send
If you have no posts yet someone from the admin team need to "approve" your post first.