I'll give you the answer first then trail on into an overly long explaination
log in as that character then type /load_uisettings
Choose a character that you know works and select them and choose ok.
That should fix your issue.
Now for the overly log winded explaination...
There are aeveral aspects to the game.
1.) The data: The data is information SOE sends that I/we have no control of.
2.) The UI/User Interface: The UI is only a shell much like a new paint job on an old car that doesn't run well... With the new pain job it looks much better but still doesn't run any better... And as a UI modder for EQ2 that's about all access they have given us... We can change the look but you still have the same ol data.
3.) Window Placement Files... Servername_Charactername_uisettings.ini This file stores some of your preferences on UI pieces such as where you last placed the windows. If you set them to auto fade and so forth...
So to sum it up...
If you have a window location issue, delete/update your window placement file.
If you don't like the look of a window aka arrangement/color then search for a modified version here.
If you have issues with the data such as crafting process locking, or if you would like more features such as advanced searching on the broker or friends list. Buy a new car or submit an in game /feedback to SOE requesting those changes.