Does anyone know about printers and computers? My printer is acting screwy..why?

Im trying to print out a lost dog fliar but it was comeing out all wrong so i pressed the on cancel on the printer and made another fliar to print out only this time it wasnt printing out what i wanted it to print out it was continueing to print the thing i tried to cancel.. i pressed print 35 coppies but its comeing out all wrong. i can print out what i want to print out because its still trying to print out what i dont want it to print out no more. Anyone know whats wrong and how to fix it? I've got to hurry up and make lost dog fliars. I have an HP computer and useing a ...brother printer? or thats what is says idk really know...so help would be lovely =]