Hi Ned,
My guess would be that the FOV for level 10 got set to something
other than 13.8 arcminutes. If it were set to, say, a few degrees,
then you'd be crowding in a heck of a lot of stars, and would see
exactly what you report (as described at
http://www.projectpluto.com/faq_curr.htm#level_x
For example: if you entered 13.8 (no trailing ' to indicate
"arcminutes"), Guide would have reset the FOV for level 10 to be
13.8 _degrees_. Try 13.8 (trailing ' included), and you should get
what you're looking for.
-- Bill