Why my property tax amount changed after completing home office expenses?

When I was working on the home office expenses section, I was asked to input the property tax paid for the whole home. Then I found the property tax amount in the Mortgage interest and taxes section was doubled, which I believed to be a bug. This was very confusing in the TurboTax deluxe step-by-step mode. Later I also found in the State return the doubled property tax paid amount. Am I doing something wrong in the expenses part?