Okay, my car has been idling very weird lately!! I did put a used MAF from a wreckers in about two months ago, my car was missing underload before I put the used one in!! The miss underload is gone now, but my Rpm at idle in drive sometimes is fine, sometimes it goes all over the place! I was sitting at an intersection yesterday, with my foot on the brake, and then the RPM jumped and the car started to pull forward. I almost rear ended the person in front of me!!!! Okay, so would this be from the TPS or the MAF

Sometimes when I come to a stop sign, my RPMs at first will drop below idle for a second or two then go back up

I vote for TPS. I have had to replace mine twice for that problem. It would usually throw a code. Yes, my wife has driven home at 45 mph with her foot OFF the gas.