I agree with the poster who noted that she may have been bagged in the same direction. In all three bags, IMO-Let me see if I can describe:
-She is bagged head first into the first bag, causing her legs to sort of fold over her trunk and head when the bag is picked up-ties on the bag may have broken at the point, KC needs another bag.
-If she goes to bag in the opposite direction, Caylee's feet are now at the bottomof the second bag with her trunk weight bearing down against her legs and feet-A little awkward.
-Rather, the second bag goes in the same direction to support the weight of her upper body without shifting the contents of the first bag too much. Furthermore, trash is much easier to bag when the heavier elements are at the bottom, gravity persists.
-The whole thing goes into the laundry bag as is, with Caylee head and torso down, maybe bent a little so she would actually be on her back/shoulder blades if the trash/laundry bags were set upright....
-But, the trash and laundry bags were not set upright in the trunk, it would have been laid on its side for room, maybe elongating Caylee's body a bit.
-Animals get to the bag and drag away Caylee's lower extremities first and then torso, while there is still flesh, as the spine was found together in a manner that indicated she had not fully decomposed at that time. Had she fully decomposed, animals would not necessarily be attracted anyway (duh, Jayla). Legs, buttocks and torso (with exception to the intestines which animals tend to avoid) are the fleshiest part of the body and would be most desireable to scavengers (Sorry, sweet Caylee).
The coming and going of water, nature's force which is strong enough to erode mountains, allows the skull to float in any given direction. As the lower extremities have been puled out and the skull pulled toward the opening of the bag, the bottom of the bag is lighter and floats higher than the front of the bag holding the skull when water moves in-thus Roy noting that the skull may have been at the lip of or under the bag. (my paraphrase)
Keeping in mind that her skull was only 6" in height, it probably was not very weighty, but had more weight than the empty portion of the bag.