Different Totals in Line 1 (wages) & line 16 state wagesI lived in Ca

My W-2 form had total wages of $40,000 (not real numbers)
I lived 6 months in AZ and 6 months in CA, both with the same company. Line 16 (state wages) had the total for AZ as $40,000 and Ca as $20,000 ($60,000). Shouldn't the state totals be the same as the Fed total. I called the company that I work for and they said to leave it alone, that's how it should be, but that doesn't make sense to me. Would you subtract the Ca from the AZ figure to get the true Az Wage? Is there a publication that addresses this situation? Could you please clarify this situation for me, I would be so grateful. e-mail lmcroft@roadrunner.com