moving windows

hello folks out there im wondering about somthing i may be doing wrong when moving windows to another monitor , when i load a plane that i want ot fly i move all of my extra windows over to my extra monitor, pedestal, gps etc. it semms to be a hit and miss , what i first do is put my main monitor into windows mode , and then undock all of the extra windows and move them over, what will happen if say there are five windows to move over and i then go back to full screen, they will not all stay over, four of them will go and one will stay behind, somtimes i will get them to all go and sometimes they wont, that is even if im using three windows , is there a full proff way of getting them to all go evertime.thanks.......................Robert