If you're viewing an image in Aperture that has Redeye or Spot & Patch adjustments and then Command-click another image to get a multi-image view, the selection circles in the first image may appear to be in the wrong place.
This happens because the second image becomes the primary image when you Command-click it to enter multi-image view. The selection circles will only appear correctly on the primary image, therefore you shouldn't adjust the Redeye or Spot & Patch settings for non-primary images that appear in the Viewer.
This issue is resolved in Aperture 3.