Casey, Catherine, and beadfreak - welcome!
Casey, A lot of the syptmoms you described in your daughter could be resulting from her SI dysfunction and her age. Asperger's is usually not diagnosed until children are older. My suggestion would be to continue with her therapies, and talk your concerns over with your doctor. A developmental ped might be able to give you the answers you're looking for. Also, just out of curiosity what kind of things does her OT do with her? Some OTs have more experience than others with sensory issues.
Bless your heart.