Excess mortgage interest home office

Very confused by the 2 statements under Excess mortgage interest section in home office deduction

 

1 - If you have excess mortgage interest and it's included in the $XX (entire home) mortgage interest reported for this home office, enter 0

2 - If you have a mortgage, but are not itemizing deductions, enter your mortgage interest here.

 

BOTH statement are true in my case and TurboTax instructions say to enter different things. Please clarify.