Thanks Rev Thrust, that prolly explains it. Machines eh, you just can't trust 'em!
The only thing I will do from now on then, is tell the pilot they are heading OCAS because they let the machine turn too early, and poke 'em back in the bag again. Oh, and we've been advised to offer only a FIS should an a/c stray outside our nice new shiny CTA if it's not of our making. That'll make them sit up and take notice.