"Other State Income" on 1099-INT State return.

I lived in MS for 9 months and TN for 3 months.  I worked in TN all 12 months.

 

While filling out MS State return the 1099-INT has 4 boxes

 

1) MS Withholding

2) MS State Income

3) Other State Name

4) Other State Income

 

I know for box 1 & 2 I calculate how much interest income I earned during the 3 months I lived in MS, but I don't understand boxes 3 & 4.  Am I supposed to calculate how much interest income I earned while living in TN?  Why would MS care how much interest I earned in TN?  Would it just be Total Interest Income - Mississippi Interest Income?