Seriously why is my baby up every 60 minutes???

We were doing 2-3 hour naps , changed, eat 2-3 oz , hang out and back to sleep yesterday after his around lunchtime nap he only ate an oz and fell back to sleep while eating and slept for an hour , then woke up and ate half oz then went back to sleep for an hour almost EXACTLY 60 minutes and this has been our schedule for the last 24 hrs. Hasn't been staying awake for hanging out he falls asleep eating so I know he's tired. It works out to be eating the same amount in a 24 HR period but he's only taking 45-60 minute naps at a time vs 2-3 hrs and that's not going well for either of us.