This was reported as a bug in the thread below, but the more reports they see on the same issue, the more likely they are to fix it.
You should be able to go to Edit Mode, then right-click on your raid-style party frames and change their size and drag them where you want.
This seems like an add-on conflict. If this ever happens when all add-ons are disabled, then report a bug in-game or on the bug forums.