I have a question, not a really big problem but just a little niggle that I don't understand. I put my home wifi network at the top of my preferred network list. It will stay there for ages but then for no reason drop to the bottom of the list. Does anyone know why this would be? \nAlso, under the General tab in System Preferences, the Recent Items which I set at 10 will sometimes reset to 0, and I have to change it and restart the computer to reset it. \nI have a 2011 Macbook running El Capitan. \nThanks for any suggestions.