Three!
DD is same, but probably 9-12 months behind. Sleep is getting better, though. She usually wakes 2-3 times, but heaps better than before.
I always used to worry about her shoulders when I was moving her around as a baby, but she was always fine and I convinced myself that babies are just flexible and maybe DS had been the same. DD has seen physio, who's only mentioned potential problems with feet & legs and that she might need special inserts, but that they wont' do that till later, unless she's in particular pain. She rarely says she is, but still quite young. I think she's just used to being tired and sore, though. She refuses to do any special exercises