First, your AGI consists of more than just a number on a single Form W-2. AGI includes all sorts of income, and you may also have adjustments that offset some of your income.
Second, it's not at all uncommon for the AGI on a state return to differ from your federal AGI. Different states have varying policies of what's included in their AGI.
Perhaps if you share what your seeing on your federal and state returns, we can help. What state returns are you filing?
