While these extraneous Props are annoying. They don't harm anything in your CR2. Here's how I delete the extra ones.

Click the Selection Arrow on your viewing Window. Go to Props and select the highest numbered extra CenterOfMass or GoalCenterOfMass prop. Hit the Delete Key. When the popup comes up asking to delete the "Figure" hit Cancel. A Second Popup will come up asking if you want to delete the "Object". Click OK. Extra Prop is now gone. Continue doing this until all extra props are gone. When you get to the one that is not deletable you'll only get the "Figure" deletion Popup. Hit Cancel! You're done.