You have 7 positive and 1 negative. Thus, net is 6. Moreover, 2 positive ones are from members who already have given positive feedback in the past. There are not counted. Only the unique ones are considered. Thus, your count is 4.
I understand about the negative ones but I didn't know that multiple ones from the same user doesn't count. I thought as long as it's an itrader, you get given a point.