How do I add a High Priest's spouse as his home teaching companion in LCR?

I am a ward clerk and in my ward we have very few High Priests and in order to cover enough ground we often assign a high priest and his spouse as a companionship. In the LCR I cannot find a way to do this. When adding a new companion to a companionship I am only able to select/search from the priesthood organizations. Is there something I am missing?

Create the new companionship and add the high priest as the first member of the companionship. After adding him as the first member of the companionship, add a new companion and start typing his wife's name into the entry box. She will be included in the list of people generated when you start typing her name.