I've been here for a while and I myself have never seen this happen. I'm able to login on the forums but not the login page or user panel? Yes, I am entering my information right. The same as I entered it to get into the forum login. Usually to get into the user panel or login page it takes a few clicks. Though, I've tried this and it still refuses to give in.
I have seen a few threads with the login page issue but never one with the user panel messing up as well..
What I have tried:
+ Other browsers. aka Internet Explorer, Microsoft Edge, Chrome
+ Refreshing
+ Clearing browsing data