I actually just watched this because of your review. It is actually filmed well but yeah, the plot holes are so huge you could drive that truck from the beginning through. Loved the bees and bitches scene though.
Oh, and yeah, the self help tape does come back when he gets to the island and asked if someone unpacked his back because he is missing his self help tape, but other then that it is pretty much a macguffin.
Good job going through the movie, the only thing I think you missed was that when Morgan was at the book store they said they only had one book on aliens and it was accidentally shipped to them, bringing the whole no coincidences formula up again. Thanks for taking the time to do this.