Firmware Update 1.1 has been very effective at correcting drifting, sometimes called ghosting, issues on the SCUF Vantage. You can review instructions on how to apply this update to your Vantage here.
If you continue to experience drifting after Firmware Update 1.1, it's possible that your controller may have an internal hardware defect and will need to be processed through our RMA system.
You can follow review instructions on how to begin the RMA process here.