I have to ask, how are you determining that the MD didn't turn in the scores?
I ask because it is quite well known that the NRA competitions division is understaffed and overworked. Thus, it takes a very long time for results, classifications, national records, etc..
In my 40 years experience I can say that for many years it was common to have the NRA Approval certificate displayed at registration and it is still an NRA requirement but like a lot of things, that too has been neglected. But let me repeat, if you are a Match Director and you apply for and receive NRA Approval you are required to post the NRA Approval at registration. If you are a competitor at a match that is advertised by the Match Director as NRA Approved you have the right to see the certificate. If it is NRA Approved the NRA will follow up if they do not receive the scores and fees within 30 days of the event.
But to be more specific as to why would a match directory(sic) lie about NRA approval? The answer is that there is a match fee of ~5$ per competitor that is required by the NRA to register the scores. Follow the money.
I find these two comments almost comical. Here is the jist of it. We are very under staffed but fully staffed when it comes to getting cash.