That kind of stuff happens to me often. I joke that it's my memory, but maybe my memory isn't as bad as I think it is. Could I be losing my phone because I keep switching universes? LOL. Who knows..... And either Words with Friends literally changes its dictionary every other day, or something strange is going on. One day Wo and Wa are words. The next day, they are not. So, I keep trying them regardless. It happens too often to just be my memory. I'm too young for alzheimer's (I think).