I had the same problem with the target health bar (Target Bar annoyances).
What it seems to do is wrap the actual bar within it's own <Page> segment. If it's the same issue I had, try changing the
Size= value to cover the dimensions of the entire window, in the "AdventureXP" Page.
After doing that with my health bar, I was able to move it anywhere within the window. It's sloppy coding, I'm sure it can be streamlined later, but I was just happy to get it to work. Hopefully it will work for you, as well.