Day Night Confusion

I think my baby may have day night confusion. He falls asleep during his day feeding time, and sleeps immediately after drinking. Even after waking up, he'll be happy for 10 mins before whining and asking to go back to sleep. But at around 2am, he will start being active and doing leg raises and stamping feet. Its hard to make him go back to sleep. Is this day night confusion? What can I do?