I planned to take your advice and try to feed him again, but then he actually slept all the way to 3am. He woke up very hungry, so I gave him more milk and he ended up having about 7 ounces. he had almost fallen asleep while eating so I lied him down and he fell back asleep for about 10 minutes and woke up crying. I checked him and realized his diaper had leaked so fix that but then he was wide awake. I put him in his crib and let him play since he wasn't crying just up. He finally went back to sleep at 4:30 and slept till 6:30. So he was up for an hour 30 minutes in the middle of the night.
I am thinking it's time to add a 3rd meal of solids because now he is 8.5 months and drinking 28 ounces of formula during the day. I was hoping by now he wouldn't need to eat in the middle of the night.