Transposer keeps a link to Poser, so the objects brought in that way are sorta 'locked.' So that would keep you from adjusting them properly. The native imports are just that, imports. So they become editable objects, with all that means. Loss of connection to the animation in Poser for one. I'm no expert, but I'm pretty sure that's your problem. (BTW, he's that fast of a swimmer? Or does a penguin come along and yank him out? ;) )