I am not sure if this is of any help, my aunt has did and one day going out to eat we were sitting at the table when the personality who likes shiny objects poped out long enough to slip the silverware into her purse, then left as quickly. My6 aunt spent the rest of dinner feeling saddened that they had not set out silver for her and felt very left out, never knowing that one of her selves pocketed the silver and thats why there was not any. My aunt never loses time as such, it is almost as if for her, these other identies inside of her live their respective lives as normal in her head and when they come out they don't know there is a difference. We asked my aunt what had just happened and she told us that she was sorry and just had made a quick run to the bathroom (as far as she knows that is what she was doing while the other her stole the silver)