[old_tv_nut]

Hmmm.... I seem to recall some problem early on where the PSIP (digital info in the broadcast) could tell the receiver a wrong RF channel due to mistaken programming. I think this was supposed to be fixed by not broadcasting the data and receivers ignoring it if it is there. This is a very vague memory and I may have it all wrong.

Can you check what RF channel your errant device is tuning to after the rescan? This might indicate erroneous info in the broadcast.

I think you should contact the station and say what particular device is doing this, and, if you can, tell them what RF channel it's tuning to after rescan. This will help find if it's a wrong data point in their stream.