Doing a range check cannot always determine a receiver is OK after a crash. Vibration, temperature and other factors can reveal damage to the internal components. This could easily be missed during a simple range check. It may even be fine "most of the time when flying". When all of the conditions are right though... bad stuff happens.

The ONLY way to determine if a receiver is OK after a crash is for a qualified technician with the proper equipment to disassemble, inspect and test it. Unless your club president, treasurer and safety officer are trained and have access to this stuff, they should have recommended that you send your receiver in. I'm sure they are good guys and great pilots but I'm sorry... I think they gave you bad advice. I'm not trying to be harsh or mean but that is my honest assessment.

I would be VERY suspect of your receiver. It has been through 3 crashes, two of them pretty violent based on your descriptions.

RC flying is inherently risky. There is a chance we'll mess up as pilots, a chance good parts or structures will fail, a chance for radio interference and whole bunch of other stuff. We must make sure to minimize the chance of things going wrong.

I'm not saying that I know for sure your radio receiver is a problem. I will say that you need to be suspicious of it though and don't trust it until you know for certain that it is certified as OK.