The whole baby alignment/bad baby positioning thing sounds so crazy now to me. I googled to find out what a Rock and Play is - looks like the baby will be in the same positioning as bouncy chairs/carseats. Can't imagine why that is not a "natural position" (Imagine how squished up baby was in the womb! Now THAT was an unnatural position).
My SIL went to extreme lengths to buy an "ergonomic" baby carrier that spread her baby's hips "naturally". She absolutely would not consider simple cloth wraps.
I get it though - when I was a new parent, I was nervous about all those things too.
We had a bouncy hammock for my own kids (traditional where I grew up).
However, I was in Canada and I just could not get out of my head some stray comment that it was "unnatural" for a baby not to sleep on a flat surface. Although it was my son's preferred place to sleep, I would move him out as soon as he fell asleep to the more "natural" bassinet next to my bed. And as far as possible, I would try to get him to go to sleep in the bassinet. Looking back, it seems rather ridiculous. I should have just left him to sleep where he felt most comfortable. The hammock sling hugged him snugly and supported him well.
Anyway, you are absolutely normal new parents dealing with a new baby you love intensely who is being very difficult to manage. Try not to get too caught up in parenting "rules" - there are millions of them and like a PP pointed out, they often contradict each other. I know it's much easier said than done. Hang in there - one day, you'll be the sage parent doling out advice to new parents :) Just shower that baby with love (babies are very, very forgiving) and be kind to each other.