Here's what's going on. Yes, the po added the 3rd bolt. I did it to mine, with a shoulder so it can't be overtightened, and it holds the antler in connection with the bumper. That's not the reason your bags droop though, the actual bag mount is an encapsulated rubber mount, like an automotive engine mount. What's happened os that the rubber has broken away from the mount internally, and the bag then sags. Check it out, you'll see what I mean. Steve