Huh doesn't mean "why", Huh is a quote from the last episode of the Doll House by Joss Whedon, where the character Topher Brink final "figures it out." Seeing it all come together, just seconds before he is going to die, he goes: "Huh."
There is something that should make you go: Huh.
Read this quote:
Why did they write it that way? If the last week's jobless claims are 2.98 million, why say "Just under 3 million?" If you know the number, why not