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Hi Jeff,
You're welcome.
What's happened is one of those bright stars has moved into the image once the mount moved and the software thinks the new star is the one you selected and so the movement doesn't compute.
So you either need to select a lone star in another part of the sky or use the subframing trick to select only part of the image to be used for callibration and select the imaging chip rather than the guide chip.
I asked the question once on the Sbig yahoo group if selecting the imaging chip instead of the guide chip makes any difference and the answer was no.
I have never noticed a difference and it makes the process a lot easier.
Greg.
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