any one else's baby at only bedtime sleep for20 min then wake up for 20 so on for like2 hrs before…

any one else's baby at only bedtime sleep for20 min then wake up for 20 so on for like2 hrs before they will actually go to bed??? he's on a scedual we have a bedtime routine. its driving me crazy every night two hrs of rocking and singing and he doesn't get to bed tell really late and wake s up super early. I just Dont get it he doesn't do this for nap.