Why is it using a second state?

I'm trying to do my brother's tax return. He lives in Ohio.  Previously I did my return for which I bought the Michigan State program. I bought the Ohio program for my brother. Why when I run my brother's return does it say I have a resident tax issue with Michigan? It seems to have started a Michigan return for my brother? Does it automatically generate tax returns for every state program I have? I only need an Ohio return for him!