Non-resident Minnesota tax filer on the sale of second home

I am a Tennessee (TN has no state tax) resident and sold a second home in Minnesota. After expense of sale I had long term capital gains of 14,980. When filling out my Minnesota state tax form through Turbotax line 9 of the state tax form says my Minnesota taxable income is 48,518. They have included IRA ,pensions and annuities income. Being a non-resident filer shouldn't"t I only pay on the 14,980? The form did consider that since I was a non-resident only a percentage of the total tax due is due by me. My question is: Should my income from IRA, pensions and annuities be taxable in Minnesota if I am a non-resident in that state?