ShapeShifts LP dashboard has come a long way since last time I visited the Canny Board, but I've been missing this specific feature.

Even though you have a symmetrical LP with half'n'half RUNE and L1, you should be able to both withdraw symmetrically (both Rune and L1 at once), or withdraw assymetrically (only from RUNE side or only from L1 side).

"Heres an example of how this looks in another TC UI."