Earlier quoted context omitted.
Germans tend to pronounce A's in English as if they were E's ("cat" is pronounced as "k-eh-t" instead of "k-ah-t" -- which I don't really understand since A in German is pronounced as "ah"), so I'm not sure if everything you learned in English class is correct ;-)
Perhaps it is the american accent they are taught, americans would say keht. I always thought it was strange football was fussball in german, yet they'd call in soccer in english.
The soccer thing is pretty funny though. :)