I have not updated my radios since the flurry of activity surrounding the turn-up of the north simulcast cell.
SOMETHING has changed in the trunked frequency list since that time. Probably they turned on the last channel.
I'm saying this because I was listening to north yesterday and regularly got open squelch, which is just what you'd expect if the radio was commanded to go to a channel that's the wrong frequency.
I'll have to look into that. I haven't even checked the database for any newer updates on that, so I'll start there.