[Therion] Cave Sketches don't offset

And Again; To get a quick preview of what my finished map will look like I've added some survey stations and cave sketches to my scraps. These plot nicely until I want to offset the map in which the scrap and sketch is contained. When the map is offset, the survey stations plot in the correctly offset location, but the sketch plots (incorrectly) in it's original location. Am I doing something wrong or is this a bug? Bruce