Musical mix-up

The church choir I belonged to had long understood that we were singing for this today's afternoon mass--that is, until our coordinator suddenly sent a text message last night (Saturday) that he had just instructed another choir that very same evening to sing in our place since we would be singing next week instead. Knowing that the other choir had precisely requested that somebody else sing during this Sunday's mass because of a conflict in schedule, I was shocked and puzzled by this sudden change--but I didn't protest or complain because I thought the coordinator knew what he was doing. When today finally rolled around however and I attended the afternoon mass, to my horror I saw that there was no choir! Oh, well.