I also noticed with the mod the random slaves generated in towns never spawned with classes/skills. All the issues I had went away when I restored the original files and loaded my game, so I don't know what else to tell you.
i couldn't observe any of those errors in my game (fresh new save just playing). Millford worked fine and slaves generated properly (with classes). Are you sure you installed it correctly? First random portraits mod (with dl link from this post not original bear's post), then tweaks on top of it.
