Is this still (?) being investigated? I've encountered this issue with the Definitive Edition and can't get above 5/7 on two playthroughs. I've tried what approaches have been recommended by most guides (using the same character/using different characters/using mask of the shapeshifter/etc.) but can't get any progress - with the added problem of not being able to track progress or what altars don't count since the Steam counter doesn't change.
