
That is just what my son weighed and measured.
He's so tall and skinny now.
Having had two children that weight and getting very stressed with he first over this, you need to remember that being this big they may not gain the ounce a day that is usual, but more like 3 or 4 ounces a week, until they reach the percentile level that they were destined to be.
My son was big for age and with a slowish gain got to the 50 percentile line and then continued along that line for the rest of his baby measuring/weighing time.
My daughter who was 9lb 10oz also gained slowly for first few weeks staying way above any of the jpercentile lines and once she hit somewhere between the top lien she continued her growth at that rate.