This thread got me curious. DorkFish, look at the pictures of my BE 45 and compare to yours.
In the first picture, standard field strip with firing pin removal. The second picture is a closeup of the removed slide internals. Excuse the reddish goop -- it's grease. Note the close-up of the slide: the black metal pin protrudes on the right when the slide-mounted decocker is engaged. Internally, the decocker grabs the firing pin and pushes it slightly forward so the falling hammer cannot strike it. The metal pin on the slide engages a lever on the frame which causes the hammer to fall and the trigger to disconnect. I illustrated this lever (final picture) by pointing to it with the firing pin.
At a minimum, I'd like you to look at (and press) the disconnect lever on the frame (picture 4) and inspect the pin on the slide which protrudes when the decock mechanism is engaged. Look for play, wear or other oddities.
Steve
ETA: I purposely tried to put the firing pin in the wrong way. This causes the decock mechanism to lock up... The lever does not move, the pin does not extend, the firing pin does not retract, etc. It would be pretty obvious if the firing pin was installed improperly. For those curious: Aim the notch in the firing pin at the rear sight (notch up). Also, the firing pin block is a little strange. It has a line on the top which should be perpendicular (forming a T) to the firing pin when installed properly AND works the opposite of the 1911 system: To lock, it must be depressed. When not depressed, the firing pin is free floating.