Thursday night, DS did 8-2, up every 2 hours thereafter. Friday, up every hour and a half from 8.30. Saturday, 8-5, up every hour after. Last night, up every hour or so and awake for almost 2 hours in the middle of the night.

So he CAN sleep through, why won't he? He gets 2 naps in the day for 1-2 hours each, had identical nap patterns on Saturday and Sunday... the only difference was that DH was around and played with him Friday and Sunday (DH is now requesting to play with DS without me there, which is fab). Is that really the issue? Or will DS only do every other night sleeping through? We have the same routine, same feed times, same games etc every day, so what's going wrong?