Newbie here i have a cr-10 and when i set the bed temp n nozzle temp and go back to the main screen it will show the temp i but but then it goes back to 200 on nozzle n 60 on the bed I think something is wrong any ideas anyone Answered

I have printed a few things and they turned out ok..just wandering if their is something wrong with it cuz sometimes it takes forever to start printing and the temp is all over the place