Stats tab not showing correct information

My stats tab doesn't show any of my recent games. 100% of my last 20 games are as support, 70% of them are as Sona, but it says I mostly play adc and I haven't played Sona at all. It doesn't show up for other people who look at my stats either. I'd like to be able to look at my stats so I can see where I need to improve, but I can't do that if I can't see the stats for the champions I play.... Edit: I forgot to add that I have to use some site that you can use to look up summoners to see my own stats...