In dash air pressure question

Howdy guys,

OK, I have a pesky slow leak in one of my tires. I'll be dealing with that. My question is: I just had my tires rotated (At a Chev. dealer) - the pesky tire is now on the rear, however my in dash air pressure is still showing the right front tire losing air pressure. That tire is now on the rear. (Yes, I had the dealer check the tire for the leak- they claim they couldn't find anything wrong). So, why is my in dash tire pressure gauge still showing the right front tire losing air pressure when that tire is actually on the right rear - ? Is there any way to correct this -- this is really bugging me.

Thanks,
Wolf