I have this same problem. I looked online for a solution and found it
( i dont have the link) however the identical solution was in my
documentation, in a little booklet i received about the CD/MP3 player.
It says that it happens because you try to set a station as a preset
when the station information ( like when it displayed WZZZ instead of
106.7? ) is blank...the solution that they state is to put a cd in to
stop the resetting and do a reset of the default settings. I tried it
and I cant get to the menu to do this, so I am still looking for a
solution. If you find a better one, please post!!!