This is an old software bug we've fixed in Version 2! Looks like your tablet needs an update!
If you don't have time to update right now, here are a few ways you can try to correct this glitch, but we really do recommend you update your tablet ASAP for the best possible functionality!
The Sphero lessons relies on the tablet camera combined with the boldly colored shapes on the mat to display the grid overlay correctly. If the lighting in the room is uneven, or if the mat is wrinkled on those shapes, it can make it harder for the camera to accurately discern the shapes -- causing those annoying realignments. Try turning on more lights, moving the mat to a well-lit area, or smoothing the mat out so those wrinkles disappear.