NOE constrains C-C vs H-H

Hi,

I am calculating a CSP, NOE guided protein/peptide complex. I am getting better results when using heavy atom to heavy atom constrains (only one cluster, lower energy ) than when using H-H constrains.

I have two questions.

Is there a clear disadvantage for using C-C over H-H. (we hope to submit it to the PDB somtime)

Is there a way to know if a constrain was ignored during the calculation maybe due to wrong nami ng?