This sounds more like Divine Divinity that Beyond Divinity (there are separate forums for each game). Anyway, the 'buggy state' you describe can be caused by having the Caps Lock key enabled; disable it to return to 'normal'. Caps Lock, or holding down the shift key, allows you to move the screen focus away from the character, but also means it will not necessarily follow the character on change of location (ladders, cave entrances, etc).
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