The weights do behave funny sometimes and other times our body behaves funny. You could be right about it being more of a recovery issue. Always try to keep your chest up during the squat and things should be fine.
I'm no expert on the ohp, but generally, a narrower grip makes pushing a little easier. Recommended grip is that the thumbs should be around 1 inch away from the shoulders and elbows pointed forward. Not so much as in a front squat, where the upper arms are parallel, just enough that when you push, the elbows become vertical.
try post some videos asap. Believe me, being a rank novice, you can easily correct your posture now. But leave it unchecked for a couple of months and you will have real hard time re-learning proper form.....like i iam experiencing with squats
