I don't understand

I sent a claim for chronic sinusitis and rhinitis. I was diagnosed with both in service and they are in my records multiple times. I am in the burn pit registry and had a TERA exam at the VA which said that I had chronicsinusitisand rhinitis. I am currently being treated for both by my primary care and ENT. I was still sent to a C&P exam. While I don't understand why I had to have a C&P I gladly went. At that exam I was diagnosed with both chronic sinusitis and rhinitis by the NP. After all of that my rater still asked for an ACE exam by a Doctor. I am still waiting on the results but WTF???? HOW MUCH PROOF IS ENOUGH??