Do you still have a save where Roderick was level 4? If so, and you wouldn't mind emailing it supportdos@larian.com, with a description of the problem, that might help Larian figure out what happened. The D:OS support tool will generate a report.zip file which includes all your saves. Alternately, you can browse to your '..\Documents\Larian Studios\Divinity Original Sin\Savegames' folder, and zip one or more save folders from there (right click and select 'Send To | Compressed Folder').
