Actually, this thing has been going around longer then you think. About 6 years ago I was waiting for the at Bedford Avenue, and something happened on the that said on the announcements: "...gentlemen, there is no K train service between *don't remember* and Parsons-Jamaiava Center. There are delays in train service."
I think it's because the way how they set up those programs to play was by using the old Jamaica service pattern, which was mainly the . That or they just mistyped instead of .