You didn't include the most recent nrecord.log on your logs. Can you try again to switch between a couple of FM stations, then repost your npvr.log and nrecord.log?
It doesn't look like you've chosen the right tuner for FM. My HVR-2250 has it on the first tuner in NextPVR. If I try the second tuner, I get the same error as you have in your logs:
Quote:2015-09-11 19:22:16.010 [DEBUG][16] Tuning to FM frequency: 102500000
2015-09-11 19:22:16.010 [DEBUG][16] put_Mode(AMTUNER_MODE_FM_RADIO) failed. hr=80070057