2. It was a mix of things. B&E experimenting around with different music, and the carts they played with the Mckenzie tape machine had either gotten damaged or wore out. The 3rd Face the Devil music cue was recorded later on a different reel, and was lost according to Hal Hidey. The reels for Break the Bank '86, Bullseye(what everybody heard from that show, was actually a 45 that was printed), Play the Percentages, amidst others were also either found to be missing or accidently thrown away.
3. It was for the modified home audience game, so the people at home could see the lever move by itself, alongside the lights that illuminated inside the plexiglas. Again this was at a time when people were still watching on small screens and black and white tvs. After that was scrapped, they took the gaffer tape off.
That still didn't stop the lever from getting detached from the base once in a while. According to Jim Peck... "The person would pull the handle down on the big slot machine and once a season you could count that handle coming off. The person would be standing there with the handle in his hand and of course you'd have to stop the tape, put it back, and then do an edit." One time it actually snapped and the lights that were still on, trickled down. Dan Enright took immediate control of the booth, to make sure that stayed on the cutting room floor.
-Dan