I can't reset this level even though it worked fine on a different level.
The problem is that it apparently saved my progress after destroying two of the sheep and not having any way to complete it.
Yeah, same problem here. I solved 7, and then pushed sheep 7 into one of the black dots, and then went into 8 and then 9; now, "reset" takes me to the point before I went into 8, i.e. with sheep 7 and the leftmost black dot already missing.