Normal weight gain??

My daughter was born at 6lbs 7oz, was 6lbs1oz when we left the hospital and 3 days later she was 6lbs0.5oz.

At her one month check up she was 8lbs15.5oz and today at her 2 month check 10lbs 7.5 oz.

The dr we say today didn’t say a word about her weight but him and I got into a disagreement about my son so I’m not sure he would say if it wasn’t.

Background my son was born 6lbs12oz he did not gain weight well. He was only 12lbs at 8 months old and was listed as failure to thrive, at his 18 month check up they were still arguing with my about his weight, not taking into consideration his height and I flipped out, as he eats More than some adults I know.