This is how activity number is calculated :
"The activity number is determined in this way:
time = number of two-week periods in which you've posted since your registration
activity = min(time * 14, posts)
Activity is updated every hour."
Ok, I am here for more than two months, which means at least eight weeks. So my time var should be 8*14=112 and my post count is 105.
That means my activity should be also 105. Did I miss something?