Hey Tiff - Firstly take a deep breath and tell yourself how well your doing!
It is really confusing with the real and adjusted age thing - and I think that sometimes MCHN's overly stress about things.
Kyla see's a physio and psychologist as part of a prem study - they see heaps pf prems and look at developmental milestones etc - I can give you the number and I'm sure they would be happy to help you with any developmental questions.
Re: Solids - You know your baby the best, and you've BTDT with baby's before, so I'd say trust your instincts
Re: car seat - I was told wether to turn the seat around is more to do with the strength of the baby's neck and whether he can adequatly support it when you are stopping, starting etc.

HTH sweetie!