Moving an object and pressing the space bar will leave duplicates, any chance the spacebar is sticking? or if no luck with that, save your workspace if customised, close Corel and restart Corel with F8 pressed, accept the factory defaults and see if that cures. If yes the workspace got corrupted if no - don't know. For future reference F8 start cures a fair proportion of Corel issues and that can include some files not opening and causing CARM.
Alan D