Back to regular sleep

So, the 6 hour sleep period was a one night deal. The last 2 nights he has been back to getting up at about 1:00/1:30 and then again around 4:00 before getting up for the day at 6:00/6:30. He has not been sleeping well during the day and so that is probably not helping as he seems to sleep much better at night if he naps well during the day.