Overfeeding? Help.

Baby is 6 weeks old and based on the weight, he should be taking 600ml daily. But at the moment he is constantly hungry, and daily intake is about 800-900ml. (90ml/2 hourly) I know the weight-base feeding volume is just a rough guide, as each baby is different. It’s just that baby’s appetite is alarming to me. (Baby is on formula by the way) Sometimes baby spit out milk, sometimes milk came out from his nostrils as well. Does any mummy experiencing similar situation?