Clear unmistakable errors like pyramiding ratings or assigning the wrong %, too little or too much. Would be pretty insane if you were assigned 100% only to realize the specifics included major ratings for two things that can't have separate ratings.
Imagine getting out and getting that percentage, only to have it revoked a couple months later as a CUE.
Your DoD rating, assuming you chose IDES, is going to have the same parallel rating that the VA assigned for whatever referred condition got you on the board in the first place.
The QA would effectively verify the VA ratings, which in turn verify the DoD rating. That is my understanding.