Heheh...I hate that when I try everything, ask for an answer, then ten minutes later find the answer.
For anyone trying to figure out how to add points to a variable round, right-click a line segment in the round chain and select "Make Variable". Over on the left side in the "Sets" tab, you will see the radii list that now has two radius points instead of only one; the points at either end of the round. Then right-click the list and select "Add Radius". That will create a new point located right next to one of the end points, most likely not where you want it. That's because Creo doesn't know where you want it yet. Just select it in the list and then go back and right-click the round-chain of segments again, and select, "Location Reference". Then just click the desired point along the round chain, and the new radius point will move to it.
