Ahhh... Their accounts were older. And they did it quite some time ago. You could be right. My wife only travels with me and so I don't know if that is done anymore. I'll have to ask them if they've been asked to have seperate accounts recently.

I do know that you can have up to 2 rooms on your "folio" and get credit for both rooms on 1 HH account for concurrent stays.

Don't know if more than 2 are allowed. (I seem to remember that 2 was the limit).