In one of the very early episodes of the show (first 3 or 4), Joey has a slipup. When a bunch of them are going to the movies, she says "the remote on the rewind of life doesn't work" instead of "the rewind on the remote of life".
Well I thought the line was Deliberately stated in this manner to add a more human aspect in the character. We all slip up every now and then, why should the actors and actresses on this TV show be any different, it helps the average watcher relate to the character.