Nighttime feeding

smbckr2

My LO is in daycare all day and gets two/three bottles and two meals there. At night, he gets a bottle at 5 pm, eats dinner at 6:30 pm, bath at 8 pm, then bottle at 8:30 pm. During his 8:30 pm feeding, he drinks about 5/6 oz. Then falls asleep. For the last few months, he is getting up 2 to 3 times in the middle of the night to eat then goes right back to sleep. Each time he gets up, he drinks 4 to 6 oz. Is this normal? I figured he was start STTN at some point, but I don't see how when he eats so much during the night. Is this the case for anyone else?