Some other oddities:

I f the card says John Smith and spouse is Jane, then the label says John Smith and Jane. However if the card gives a full name to Jane Smith, then the label will be John and Jane Smith.

The spouse feature is erratic. I have a nephew Alasdair with spouse Karen. The label does not include Karen. Similarly my niece Ingrid has a spouse Martin and he does not get on the label. Clearly the sex of the primary person on the card is not the issue. This would be a great feature but for this bug.

As I look further into this, it looks like the spouse gets on the label if the first letter of their name is earlier in the alphabet than that of the primary person on the card.

So Michael and Ellen works, but Michael and Nancy does not. So far I can find no exceptions. Anyone else?

It appears that this goes a little deeper than that. I have found that Henry listed with a spouse of Andy, does not work however Henry with a spouse of Andrea does. Also, Henry with a spouse of Martha works.

Another listing with John Doe with a spouse of Mary Jane works if Mary Jane has a card that lists John Doe as the spouse.