1098 Mortgage Interest and Rental Unit

I have a duplex where I live in one unit and rent the other.    I just enter the total amount of everything and let Turbo Tax do the 50% Math.    However,  I have a questions.  When I enter my mortgage interest and taxes in the Rental Income section I see the amount that it says will be deducted for my personal portion. 

 

However my question is this ... later on in Turbo Tax when I get to the deductions portion it ask me to enter the values from Box 1 of my 1098 ---- do I only enter 1/2 the value here -- even though that entering 1/2 the value will not agree with Box 1 of my 1098.

 

Any clarification would be appreciated.  Thank you.

 

I remember in past Turbo Tax versions it gave better guidance on this.