Im certainly no expert, but my girl went through a phase of sleeping, waking up, pooping, taking about two steps forward and going back to sleep all within about 3 minutes. I only noticed this behaviour after a few mornings waking up to find her with poop on the back of her tail, but eventually I caught her in the act. She did this when she was gravid and her pooping habits returned to normal after.
Is Swatke brumating or semi-brumating right now? If so, that could be one thing throwing off his system if he has recently eaten.
That is not a normal thing for them to poop when they are asleep or half asleep. Or did he just eat way too much last night, or did he get too warm overnight?