Yeah there is check and balances. It's passed through 4 people who are in the claims process. Then checked again before the claim is signed off on by the rater.
If you have a service officer give them a heads up about your issue and have them look at your claim really well. The VA constantly still makes mistakes. Like me for example I was rated 30% for headaches when i should of been rated at 50% so I re-filed for a cue (clear unmistakable error) then it was corrected and and back pay goes back also. Go the the VA blue button and download your C&P exam and check it the to the 38CFR to make sure it's correct