Compass and Target issues

Hi,

I am currently trying to run a time series analysis on the star U Gem and I am experiencing two problems.

1. My images appear to be calibrated, however, the compass in the bottom right corner is wrong. The program still identifies the stars correctly, but I'm wondering if this could be messing up the sequence.

2. Once I identify my target star, comparison star, and check star, their locations do not stay constant from image to image. For some reason the bulls eye moves off the stars no matter how many different settings I try to change. It will be constant for a few images, then one of my identified stars will suddenly move out of the inner circle. When I try to run the time series no graph is made for my comparison stars, and the light curve for my target and check stars are identical.

- Nicole