It sounds right to me, but I'm not native, so...
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Haddiesomething about it doesn't seem rightThat could be because it seems to have been taken out of the context it should be in. Let's say that it can seem natural in an appropriate context, but it seems strange as an isolated sentence.
Haddiewhether or not it's grammatical.It's grammatical. "Grammatical" is a very low bar to cross.