I have a half sister through from my mother's previous marriage. The individual page for my mother has three family IDs (one for her parents, one for her first marriage and one for her second). I can see my sister on the first marriage and I can see myself on the second. Additionally, I can do a Relationship Chart between my sister and myself and it correctly identifies us as half siblings. However, when I go to the Interactive Tree, I cannot see my sister or her biological father. If I click on "Show or hide multiple spouses," The tree shape near my wife and I changes slightly, but my sister and her biological father are still not there. I have tried this on Chrome (Windows and Mac), Firefox (Windows) and Internet Explorer (Windows) with identical results. Is there something I'm missing here?