It's the latter. But it always drops to the same position from the top of the desktop irrespective of how high i place it. So it sounds like your original solution was close to the mark. The issue now is that nothing displays when I set the Y axis to 0 for Year and Month. However, I seem to have fixed it to my satisfaction by setting the Y axis to 18 (which is the first position in which the month and year are fully visible)- at which point the drop down bug seems to go away. It would be nice to find out quite why I can't set the Y axis to 0, but as it stands it all seems to work.
Thanks for all your help!!!!