Jacob's one month appt

My baby is one month old!!! We had Jacob's one month appt today. Thankfully my friend Kristen called me yesterday and we scheduled a play date for Joshua and her daughter, Natalie, during Jacob's doctor's appt. Very helpful. So everything went fine at the doctor's appt. At 10 days old, Jacob weighed 7 lbs 12 oz. Today he weighed 10 lbs 4 oz, which was the exact weight of Joshua at his one month appt and Jacob was smaller. His length has been a little weird. At birth, they measured him at 21 inches. At 10 days, he was measured at 20 1/2 inches and today it was 20 3/4 inches. So not exactly sure what's going on really. He's listed as 66th percentile in weight and 21st percentile in height. Next month we are scheduled for the first shots. It's going to be a sad day because I also schedule Joshua at the same time for his 2 year appt and he has to get his 2nd flu shot. I told David he HAS to go with me!!!