Foreign income as self employment living in US

This is my first year with foreign income. I live and work in the US. My husband lives in the US but works online for foreign income so is considered self employed. We file married jointly.

I have entered his income as foreign income, but when I enter it (again, essentially) as self employment income, his income doubles. 

If I only do foreign income, his social security tax for the US doesn't come through. 

What to do? Please remember I'm a beginner with this kind of income.

Thanks in advance