Hello:
Poor thing. Yes, you are right, the dark circles under the eyes can mean allergies. Could be from enviromental allergies or food allergies.
Does she seem more irritable or just throwing up more?
Some little ones have Delayed Gastric Emptying, meaning there food sits in the stomach longer than it is supposed to, does not digest fast enought, therefore causing them to throw up hours after they eat.
My son, was just like that. He would eat and eat and never said no to food. I just had to limit his amount, because I was overfeeding him thinking it was the right thing and it caused all sorts of problems.
It really does not sound like you are feeding her to much though. 1 cube is eqaul to 1 oz. (I believe), so 2 cubes would equal 1 little baby jar of food.
Maybe try just cutting back to 2 cubes of 1 food for lunch and then 2 cubes of 1 food and the rice cereal for dinner.
How much formula is she drinking?
Also, she could just be getting sick. Dark circles, throwing up can be signs of a virus and not feeling well.
I hope your appoitment went well and please let us know what they say.
Hugs, Wendy