Presuming that the lens is a collapsible Summar, Summitar, or Summicron, there is no way that adjusting the aperture should rotate the lens, as they all have a friction lock on the bayonet of the collapsible mount. All of them are in non-rotating focusing mounts. Presuming you are giving them the proper 1/6 twist clockwise after extending them, if they aren't holding still, the friction tabs need to be adjusted.
Now, Elmar (35, 50, or 90) or Hektor (50 or 135) with rotating fronts, you just have to adjust the aperture first. No other hope.