Your description sounds like the double set trigger is working as it should: Pulling the front trigger alone rises it's rear end against the kickoff lever and pushes it up, releasing the sear. The set trigger function follows. pulling back the rear trigger, in fact a cocking lever, against the pressure of the set trigger mainspring, pulls it's front top end away from the kickoff until it is arrested by the detent in the front trigger. Now, on touching the front trigger, the rear one is released and flies forward/up, powered by the spring. Inertia pushes it up until it hits the kickoff and releases it. In using the set function, the front trigger does not even touch the kickoff. From this basic double set trigger function results a little known danger: If you push the rear trigger forward instead of pulling it back, the gun will fire too, often with less pressure than needed when pulling the unset front trigger.