Property tax deduction on one property in NY and NJ. Confused.

I am filing state returns in NY where I work (non resident) and NJ - where I live. TT deluxe is suggesting a property tax deduction on my NJ1040 return and recommends that I itemize on IT-196 and also claim the property tax deduction on this form. I only have one house in New Jersey. Is this correct. It seems like double dipping to me.  I am only itemizing on NY, not of the federal return.