Hello all, The problem is solved! What it was (and perhaps it's a 'bug'?) is that if you have the grids set for 6 characters, it will ignore the 4 character grids in the exterior grid window!
I use the 6 char grids for UHF work to zero in on a station and 4 character grids for 6 meters/2 meters. Thanks all for your suggestions and let me know if you agree that this is a 'bug'. 73 DE AI3W, Rick