From what I understand, the 50 points is for creating and validating your account. I don't think you get an extra 50 when you confirm it.
I was just going by this
And points are granted as follows :
Account creation: 50
Account validation: 50
"Question"-type thread opening: 15
"Discussion" or "Poll"-type thread opening: 10
Answering a thread or commenting a news article: 4
Selecting a "best answer" : 25
Being selected as the "best answer" : 40
it makes it seem like there's two 50 point awards.
not that I'm really concerned. The site helps regardless of what "level" I'm at