The Feature Ring in SP can "stick" to the top of the model. When it does, it can't be moved using the "move feature" in the Bowl Settings (move down, in particular). To witness this phenomena, open the sixth vase profile in the overall Profiles list. Next select the "Feature Ring" radio button in the Bowl Settings. The Feature Ring is added at the top of the vase profile and can't be moved - it's stuck. I can "un-stick" the feature ring by selecting the top "knot" point in the Profile View that is below the top Golden Ratio line and moving that point away from the center until that point is clearly at the largest diameter. Apparently SP wants to locate the Feature Ring at the point at the greatest diameter within the Golden Ratio lines. The profile of this vase and some other profiles show their greatest diameter outside outside the red lines, but I don't know if this interpretation is close to being correct?