strobing maxie

so i decided to practice my strobism wit maxine, she wouldnt stay still though....so it was very difficult, if anyone can possibly help me out on how to avoid the ridiculous shadows on the left of the photo, please help me out!

 

my set-up was as followed

580exII set at 24mm zoom and 1/4th about a foot away from subject aiming down on her.

Done