Assigning Wife as Home Teaching Companion

We have some husband/wife home teaching companionships. Some of these companionships transferred over from MLS, but others did not. Some transferred showing only the wife, without the husband; however, I cannot add the husband. The "add a companion" button appears, but it won't let me add. Suggestions?

You'll probably need to remove the wife as a teacher, add the husband, and then you should be able to add the wife back in.