Davy, if you look at how the slides are installed in your BH you will see that the only thing that moves the slides are two arms that extend and retract at the bottom of the slide.So if you are retracting the slide the arms below start pulling in, but only at the bottom, so the bottom will start to move first followed by the top of the slide.And yes, the slide just hangs out there. It is riding on a nylon glide strip and when extended, once it gets into position it will drop down a bit so it sits at floor level.Then when you bring the slide in it has to come up out of it's dropped position then pull in.Hope this helped somewhat.
It sounds like your slide is operating normally.
Peace
Dave