Glitch for mac (red right click)

At a random point in a game, my right click suddenly turn red. At the same time all of my moves and summoners go onto quick cast. When I auto attack any enemy, including structures, I can't stop abutting until they are dead, and then i go onto the next unit. I think this is because when this happens my auto attack becomes turned on. I can press p or esc or any other button except moves, summoners and numbers. I can type though. I know a friend with a similar problem and we both have MacBooks. Please help, because I can't play ranked without risk or dc and coming back in which does work(but it still happens in the same game). Thanks so much