We bought an Owlet and had the same problem initially. The first week back home in my state of delirium, I put the damn thing on wrong several times. Had the damn Rockabye baby song going off in the middle of the night a few times and twice had low oxygen alerts which scared the absolute shit out of me and my wife. I eventually learned to put it on correctly and we use it every single night without issues.
I will agree with this statement. My daughter will be 4 months old next week and has been in pajamas about 95% of her life so far. I will also say fuck buttons and snaps. Two way zippers are the best thing, especially for those late night/early morning diaper changes.
Giant bottle of ibuprofen ftw. I can relate.
My daughter has a giant bald spot on the back of her head, too. Drives my wife nuts. I told her not to worry about it as it will fill in as she gets older and is able to sit up on her own more often.
I second the band shirts. I am looking forward to my daughter being a little older to fit into the RHCP onesie.