Mom15, I don't think so! I've never heard of any multiple relatives. My husband's grandpa was a twin, but that's about it (and I know twins come from the maternal side, right?).
I'm really thinking I ovulated earlier. If I'd just been paying attention to my signals, I would have assumed CD12. But my temps told me it was CD14. Maybe my temps were off because I was traveling that weekend? I know traveling tends to give me lower temps.
It would make sense -- our BD timing was MUCH better for CD12, it would explain the early positive (because I would have been 10 DPO, not 8 DPO), and it would explain the higher HCG, because 2200 at 18 DPO is a little high, but not too crazy.