Yes, it is possible for one point to be in two different
planes. Imagine this: take the point in the corner of a room. That point is
part of 3 planes (both walls and the floor).
To add, in mathematics, a plane is a flat, two-dimensional
surface.
It likely hit a barrier like a wall for example and the force of the ball hitting the wall caused it to be pushed away. Another possibility is that the ball was kicked up some sort of slop and when it was at the ten feet it slowed down and then rolled back down. I hope this helps.
