If you look at the numbering of The Surface on the cover you can see it was always meant to be a 4 issue mini. That's Image's biggest problem with numbering. They try not to let you know certain books are minis nowadays because apparently more people will pre-order/buy them if they think its an ongoing. Dynamite has the same problems with some of their books. They don't label something as a mini, then when the final issue notice gets hit with issue 4 or 6 they go "It was always meant to be that long."