WowAce

Raid Frames column growth direction does not work as expected. If set to grow upwards it grows downwards and then shifts the old row down (as opposed to placing the new row below). Or otherwise explained as: Down = Fills rows from the bottom. Up = Fills rows from the top.

While having the shift/fill direction as an option doesn't necessarily hurt (it essentially allows people to reverse the order of the groups), I feel there would be more flexibility with layouts from allowing it to properly grow the frame upwards. Particularly when it comes to anchoring of other frames.

Anchoring in RFs is more controlled by Blizzard than anything in SUF, and is influenced by how you anchor the frame as well. It's not really something that will be fixed in SUf.