I had this very same problem only I was nursing. Here's what I was told when he was 3 weeks old and I visited the hospital's lactation nurse...
The feeling of gas, to babies, is the same feeling as hunger. This means your baby may really only be responding to gastrointestinal discomfort rather than hunger pangs. By feeding her too much you can increase her GI discomfort by making her too full. I was literally told to NOT feed my baby within two hours of the last feeding b/c:
1. He was gaining more than or at least an appropriate weight for a baby his age.
2. At that age/weight, he physiologically did not REQUIRE more food within such a short timeframe.
3. It was evident that he was taking in a relevant amount of calories (they determined this by weighing him pre-feeding and post-feeding to see how many ounces of breastmilk he consumed.
My baby was a very fast eater, too, and this caused him to be more gassy than usual. Don't be fooled, though, if there is no audible or other forms of gas you can readily detect. My son hardly ever passed gassed, but apparently he held a lot of it in.
Instead of feeding a second time within 2 hours, try other methods of comforting. You might need to switch formulas, as the one you have may not be the right one for your baby. Make sure the baby is as upright as possible when taking the bottle. Never prop a bottle up; always hold your baby while feeding. You may also need to change bottles/nipples to one that brings in less air.
Here are the stats for my son:
Birth - 8lbs. 0 oz.
One month - 10 lbs. 13.7 oz.
Two months - 13 lbs. 11.3 oz.
Six months - 18 lbs. 14 oz.
One year - 25 lbs. 13.8 oz.
18-months - 33 lbs., 36" tall
He is currently 23-months-old and still weighs between 33-34 lbs. and is about 38" tall - yes, a big boy! So, you see...me making him wait to eat at times did not stunt his growth!
I hope this helps! Best wishes!