Am i overfeeding my 10 day old by giving him 2 ounces of formula every 2 hours?

If you are training him to eat every 2 hours that is how to do it. I would space the feeds out and work to get a better feeding pattern. Infants can fit 1/2 their poundage as ounces in their tummy. 4 oz for 8 lb. If you gradually space the feeds you both can get more sleep and the kid will get more less often but it evens out.

If you notice frequent spit ups, wet burps, try feeding less frequently. The baby should tolerate feeds and gain weight. A review of weight at a two week appointment may be helpful. Watch for signs of above findings.