I am having difficulty when I have overlapping grips. When I use the crossing feature and select all of the grips that are stacked on top of each other and try to stretch all of the grips only one of the grips stretches. I can then go re-pick the other grips left behind an the remainder of the grips will all stretch together.
Does anyone have any idea when it seems that only one of the overlapping grips moves the first time and when all of the grips don't move the first time?