Alright, I need to talk to you. You may be the founder, but you've been gone for so long that the other admins can change things. Stuff that you set up a long time ago will change. The theme I set is the new default theme. You can't just suddenly seize control again after you've been gone for several months. You'll cause an uproar in the new admins and that is not what we want in our founder.
Besides, if you didn't want the other admins to change anything you had set up, why did you give anyone other than yourself power? You should have had the foresight to see this coming.
I'll be changing the theme back tomorrow, because your sudden reseizing of control is like poking the community with a sharp stick. You don't want them lashing out at you, do you?