Hi, I have had my phone a week. When I pinched the middle home screen it would zoom out and show me 5 home screens for me to choose from. Somehow, over the past couple of days, I appear to have added first a sixth screen and now a seventh. Both are blank. I cannot find any way that I have added them, nor a way to remove these additional screens. Am I going mad? Were they always there but didn't show when I used to pinch? Or is there a hidden option deep within the settings? Comments much appreciated. Thanks.