BankPage PackLocation="fff,fff"
Should anchor the bottom right corner of the BankPage to the Bottom Right corner of the parent page.
I haven't had a chance to test my hotbar code yet, so I'm not sure how to reserve space around the IconBank but I believe thats what the...
clientmarginFrame="10,10,5,10" clientmarginNone="10,10,5,10"
...settings on the top page is for.
I'm guessing (when IconBank PackLoc="left,top") the parent page width is calculated as IconBank width + IconBank x + clientmarginRight. If that's true, you'll need to set the right margin wide enough to accomodate the BankPage, assuming you don't want it to overlap the last kotkey.
I susspect the parent page size calculation is dependant on the IconBank's PacLoc. If its set to "right,top" x will be the IconBnk offset from right of parent and left margin value will be used.
Least that's how I hope it works