Schedule 6 Eligible Spouse

I've prepared our taxes together.  Schedule 6 says NO to "Do you have an Eligible Spouse" even though I do (all criteria matches).  His income is only from OAS, CPP and RRSP.  Is that why it said NO and did not include his income from Line 15000?  I don't want to get a WITB credit and then have to pay it back because the form is wrong.  Thank you.