Fundamentally, it means that SkyView thinks you're tracking to the right of where you are pointed. This probably means that your magnetic heading is slightly off. Could be a slightly misaligned ADAHRS, though if you haven't gone through the calibration process yet, start there. If you have an uncommon GPS, it's also possible that it's outputting true and not magnetic heading, and that will cause GPS track errors by the mount of the magnetic variation for your location (varies around the US) It's important that the ADAHRS be straight though, so don't rotate it in yaw to fix the heading: that will adversely affect the attitude indicator.
