I just rewatched the intro to the match from yesterday. And it's CLEARLY stated by the ring announcer that there are only four ways to win. Pinfall, submission, escape through the door or over the top. Stipulation that "both feet must hit the floor" for either escape to count for a win.
About two minutes into the match, Michael Cole reiterated the two feet touching the ground thing.
Here is from the pro wrestling wiki:
World Wrestling Entertainment currently uses the rule that there are four ways to win: Pinfall, submission, exiting through the door, or climbing over the top and down to the arena floor. For both of the latter, both the wrestler's feet must be planted firmly on the floor, or the escape doesn't count. Before this, however, most of WWE's cage matches could only be one via escape (leading to the "no disqualification" rule).
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I'm not trying to make a mountain out of a mole hill, I just find the whole situation to be odd.