how many bars are lit on the display? all 3 horizontal segments means user programmed scan with priority. i think only the bottom bar lit means basic scan no priority.
also, early '90's model low band maxtracs had a run of bad firmware. i remember having to change the prom in a bunch of them for the local SO so scan would work with priority. this was in 91-92, if the radio is newer than that i doubt it has the issue. but it could be part of your problem, unfortunately if it is i dunno if the fix is still available.
if you do have all 3 bars lit, it scan ONLY the channels you manually added to the scan list. i think it is press and hold scan until the ch number flashes, then walk thru the channels hitting select 1x to put them in scan, 2x to make 1st priority, 3x for 2nd, then 4th time to remove entirely. when done hit the scan button again. i may be wrong on that, but it seems like that was how it was done. been a few years since the last time i had to prog scan list on a maxtrac!
