Received a Manton bore rifle today. I was surprised to learn that the right lock must be cock at least once before the left lock can be cocked. When the right hammer is cocked, the rear trigger is "set" (moves forward) and allows the left hammer to engage. Without this, the left hammer can be thumbed back but no full or half cock can be felt. The right lock can be left cocked or at half cock or lowered backed down and the left hammer will engage. Obviously designed this way. I first thought "Cool". Then thought, something else to break and what that might cost to fix. Anyone else hear of a set up like this? The locks have stalking safeties. Thanks in advance.