CHIRP

I can setup my channels on the computer and print out a screenshot of what I have done. Then I send the data to my radio and it is successful for everything but the DUPLEX settings of - or +. I have tripled checked what Chirp says I wrote to the radio and it doesn't match what I see when I look thru the MENU option of 25. For example, Channel 18 should be - and on my Chirp setting it says that...but when I check the radio MENU setting (manually) it shows +. The worst part is that if I change it manually...then it changes OTHER channels. It only seems to be a problem for the Duplex setting...the frequency remains ok, as does offsets. Also, I follow strict guidelines to turn the radio off and on and be sure it's on VFO mode when I activate CHIRP etc.

Am I missing a setting to LOCK IN a DUPLEX - or + perhaps??