The Nano app seems to be working now. VFO A was the answer, so I'll have to be careful to leave the TS-480 in VFO A after use with the control1258 and head.
The next problem that I have is that the radio is overmodulating on transmit. It appears that the mike setting for the control head and the Nano are going to be different.
Things I would like to see:
1) Ability to switch between VFO A and B
2) Mike gain control
3) Ability to activate Antenna tuner
4) Ability to switch between Antenna 1 and 2
The application looks very encouraging. I can see many times that I would use it for, even if just to test the remote base station. I look forward to future improvements.
Thanks to the people at Microbit and Remoterig for the help with this problem.
73, Joe, K1ike