Strange, I just have tested it in beta e1.7.1 using some older save file and it worked for me just fine. My sister and two of my companions got 3 foucs pionts each. I have sister, two brothers and 8 companions in my clan.
I have tested it again, but this time I got married first, and it still worked just fine for me - sister, older brother and one companion got their 3 focus points.
I'm curious if underage clan members could get those points, or if they could in some way cause them to dissapear. Do you have any young children in your campaign? Because I don't have any kids in mine.