Glad it worked :-)
If you are entering people manually, like I do, it's very easy to forget these buttons when you're working back in time, adding parents to people - then you have to go back to the child and into edit mode to complete this. It's easier to remember when you're adding more children to a couple of parents, since you'll usually go into edit mode for the child anyway.
I think the relationship finder is the only place unchosen buttons will show up (apart from edit mode). Don't think this shows in the profile page.