Yeah, well, she gave Dummy an identity crisis with her mystical pony brainwashing, so it's not like she's batting a thousand here, either.

[At least, that's what he overheard and was able to piece together from Fluttershy's half of the conversation via eavesdropping when he was letting them talk. And why he presumes Dummy's mood went down the drain about five seconds after he set up that discussion in the first place.]

At least you got your half straightened out.