A and B are not channels. They display the channels or frequencies you are currently using. If you have your real channels set improperly, then you would possibly have those problems. Review the FAQs and website of
www.miklor.com. Answers lots and lots of questions.
Jardy Dawson
WA7JRD Ham Radio
Message relayed through SETI (Search for Extra-Terrestrial Intelligence, although no terrestrial intelligence has been found yet, either)