Just to pick up on Steff's point about repetition, I don't think it matters a tuppenny if you repeat someone's selection, on either KM or even on the (perhaps) less cut-throat MM.
The idea of both competitions is to try to guess the answers correctly. And if some of you are kind enough to entertain us with subtle puns et al, you know that it will reduce your chances. So be it.
In any case, I doubt if any of us search back through the previous entries - at least until we've posted our own.