I haven't even looked at it in months. What a pain in the gui. Pick one orientation and stick with it.
Anchor works our really well if you are willing to sacrifice the length in portrait. Design your panel as if you can only use the 768X768 square in the center. Use the remaining space at either end for subpage/navigation bars.
This way when you rotate everything has an equal amount of space to end up at in either orientation.
Avid Stamp Collector - I really love 39 Cent Stamps