IT shouldn't be
Take your W-2 in to the Finance people and see what they say...maybe you are mistaken, maybe someone mistyped your information, maybe their W-2 computers are all fouled up and may now need to send out thousands of corrected W-2 forms to a lot of folks....But your Finance people and your W-2 in hand is the place to start.
____________*Answers are correct to the best of my knowledge when posted, but should not be considered to be legal or official tax advice.*