Hi ladies, haven't been on these boards in a while. I think you ladies should look into Benign Paroxysmal Torticolis (BPT). The symptoms that you both mention sound a lot like it (staring seizures, vomitting, clean MRI/EEG). Not saying thats the case with you ladies but u can read up on it and see.
It is a rare neurological condition that kids grow out of by the age 5. My DS has BPT he is 2 1/2, he didnt have the seizures but I know of other BPT moms who that was the case with their LO.