Well far as the wraith thing, maybe Rumpel didn’t know that Regina altered the curse to put a fail-safe in. The curse sounds kind of like a computer program, doesn’t it? Rumpel wrote the basic code, which may have been beyond Regina’s skills to do herself, but she still could make a few changes to customize it.
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“If I had a world of my own, everything would be nonsense. Nothing would be what it is, because everything would be what it isn't. And contrary wise, what is, it wouldn't be. And what it wouldn't be, it would. You see?” -- Lewis Carroll, Alice's Adventures in Wonderland & Through the Looking-Glass