thats odd, you say your switching back and fourth between the fobs? Are you programing both fobs at the same time? If not then that what you need to do. Because when you just program one fob the car wont recognize the other one. So if your switching between fobs every few days that might be your problem. Other than that simple solution im not sure...
ZETEC Crew #26 SR #20 YELLOW BLAZE OWNERS GROUP#4
Moderator Pilot, 12 SE HB ╠╬╝, 2011 Ford Edge SEL AWD