I tried this too with similar results. I've had similar issues with trying to start aboard the USS Khe San on Utes map. I end up in the water rather than on the deck. (At least, it seems similar).
For the people who were having trouble with the HALO drop and getting stuck in chutes, I had this happen when I was dropping into a clearing at a steep angle on a hill near a hilltop objective.
I was then being dragged while still in the chute (which I thought of as a cool manifestation of actual parachute physics, rather than a bug) until I *ejected* from my chute, then I was fine and ready to move normally.
I sort of look at this as 'the chute is still full of air and dragging you and you need to cut away'. So try EJECT next time you get stuck like this.
And retroactively, thanks to Norris for the good directions on doing a helo extraction!