Are you seeing any kind of muzzle jump on the first shot in singles or doubles?
If so, you have the recoil set too soft.
I have mine setup to where I feel a little push - I wouldn't call it recoil - on the first shot but this helps return the stock to the "starting" position for the second shot. In my experience it takes some time to get the settings just right for both singles and doubles. The best piece of advice I can give is to take your time and not get frustrated. Believe me once you have it setup correctly you will love it to death.
If you feel like you have hit the wall and are out of ideas call Vern Brown.