Hi Grinity,
She actually went to OT and they mentioned gravitational insecurity but sent her packing saying it was "fixed."
Her little sister is very athletic and coordinated. She lifted her head and looked around when they laid her on her tummy to be weighed right after she was born (after I held her)and rolled over at three weeks LOL In many ways they help each other. The older one has learned commonsense things from the younger and the younger picks up words and concepts from her big sister.
I have given up on the bike thing for the moment. It isn't that important. If we can ever get back to OT, I'll have them work on this again.