Is that model a MPD ? if so you need to recursively multiply the type 1 line matrices.
You also need to combine the rotation and position vectors into one 4x4 matrix otherwise placement will go wrong sooner or later when working with mpd's (which seems to be the issue in your picture).
You also need to combine the rotation and position vectors into one 4x4 matrix otherwise placement will go wrong sooner or later when working with mpd's (which seems to be the issue in your picture).