Group Window help

[depechenode]

I am trying to redo my group to allow filling Right to Left , instead of the default Left to Right. What I want is it to fill as follows:

GroupMember3 GroupMember2 GroupMember1
GroupMember5 GroupMember4

I tried placing the member pages in the uibuilder in reverse order as the default and also played with pack location on all the pages to pack Right,Top.

When in game, the window still places all members based on GroupMember1 left to right or top to bottom. Is there anyway of changing this fill? Again, I am trying to fill Right to Left.

Thanks