Hi Dave. It sounds like you may have adjusted it outside of it's limits. I sent you an e-mail but a quick answer to your post.
Normally you should not need to adjust it at all as each and every trigger is pre-adjusted in a Gamo trigger pack prior to shipping and most do not require any adjustment, especially in a Gamo. Adjusting the secondstage counterclockwise from it's original setting will bring it down pretty close but the adjustment must be made in very tiny increments. That said, when adjusting either the first or second stage, each has an impact on the other adjustment. Unless care and caution is used and the adjustiing procedure was followed, it will probably require setting up and adjusting again from scratch.