What position is your Rate slider in when you land?
Check your sticks and other controls in the Hardware Monitor and make sure the display matches your movements without lag or jerkiness. If it does clean your sticks with a plastic safe contact cleaner.
Once things look good in the Hardware Monitor, double tap the Volts icon to bring up the Channel Output display. Check that CH1 follows J1, CH2 follows J4, CH3 follows J3, and CH4 follows J2 (assuming you are set to Mode 2 for stick control). Press B1 and check that CH1 displays -25%. Set the Rate slider to full rabbit and ensure that CH1 goes to 100% with J1 full up, and 0% at full down. Now set the Rate slider to full turtle and you will see CH1 restricted to 20% to 80% at full movement of J1.
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