As this thread and other threads have suggested, the method that SGP uses for plate solving/centering can be problematic. By doing a sync of the mount, SGP is changing the mount's sky model which is not a desirable side effect. What SGP is doing is telling the mount "this is really where you are pointing" and then doing another slew which in effect is doing a delta RA/Dec slew. As others have suggested, it might be better for SGP to calculate a delta RA/Dec rather than depending on the mount to do it. By skipping the sync, SGP would avoid interfering with any pointing model.
The current method seems to work well for many mounts so changing it has to be approached with caution. If @Jared where to create an experimental SGP version that used a delta RA/Dec approach, I'm sure many of us would be willing to test it with different mounts. It would require a significant body of successful tests before making the change permanent. We would not want to be solving one problem while creating other problems.
