USB plays on startup independent of last setting

Perhaps this has been covered before?

The radio defaults to the USB drive independent of it's last setting. Even if I turn audio off - on next startup, the USB begins playing. If the radio was last played, the audio unit goes to that radio station for 2 seconds - then goes back to playing the USB drive.

Anyone know how to have the radio unit stay on it's most recent choice? (Other than pulling the flashdrive.)

Thanks all.