kja426:
Don't take the razzing and joking seriously...they don't mean anything personal by it; I also took the joking the wrong way when I first started posting here; some posters here are wired a bit differently, but they do their best;
seriously, I've had this happen from time to time when I was running heavy on the accessories (ac, defrosters, etc);
the ac will draw power from the motor since the compressor runs off the belts and the defrosters, wipers, etc suck amperage from the battery and these newer cars are electronically controlled, including the transmissions;
the shifting points may be compensating from trying to adjust to the loads on the engine and electrical systems;
if you are not experiencing the phenomenon when running accessories, your plugs may be fouled, your injectors may be fouled, or it could be bad gas