Is It Normal To Uses Washroom After Taking Evac-Q-Kwik Kit?

My mother in law had a IVP procedure today and to prep her for this procedure she had to do the evac-q-kwik kit and follow all the directions for this yesterday and today every time she ate anything 10-15 minutes after she was done eating she was using the bathroom and it looked just like what she had just ate we are VERY CONCERNED because she is have 3 procedures done on the Thursday February the 11th 2010. She is having them all vaginally the Cystocele, Laparoscopically assisted hysterectomy and a Rectocele. Is this something we should be worried about?!?!