Sorry if this has already been discussed but was just made aware that surface areas override each other. Yes, I'm ashamed of not discovering this myself earlier but since I really hate those pools of electrified water, ice, fire, acid etc I tend to not create them. But this also effect crowd control spells like Grease and Web. You can't have both up at the same place. And God forbid that your opponent spills some blood on it because *poof* the surface is gone.
I guess the override function was coded so that you could put out fires with create water but still...
