When a character sits, stands up, lies down or turns their back -- so does their doll. Clothing is removed/replaced as needed. Injuries are painted on with highlight markers and removed with alcohol wipes.
Here's a shot of Channie and Josh's dolls after a rather violent scene in "Finding Valor" I'm not going to say too much about the injuries, except that Channie and Josh did NOT do this to each other! I don't want to give anything away, but I thought you might get a kick out of seeing the lengths I go to just to keep things straight.
I'd love to know how other writers maintain continuity with their characters.