Rolling in to side of crib.. .what to do? (repost from 0-3 mos)

JWSchwarz

My 4 week old has somehow managed to roll over on his side all the way in to the side of his crib. I don't have a bumper, thank God. But, last time it happened his arm was sticking out from the slats. It's happened about 4 or 5 times over the last couple of days. I find him on his side with his face up against the side almost every time I go in to feed him in the night (every 3 to 4 hours).

Is this normal or do most babies just stay in one place when they sleep?

Also, we have been doing a 1/2 swaddle until now (under the armpits so the arms are free). Do you think I should do away with this and just put him in a sleep sack? We didn't like the sleep sack much because it's hard to get him in it after the middle of the night feedings without completely waking him up. 

Thanks! 

Lhand11

Breathable bumper maybe? I would do the sleep sack. And maybe put him the other way in the crib-short ways so the ends are parallel with his body and further away. We do the half swaddle but he isn't rolling yet.