Hello,
I have just noticed that many people (including me) have different contributions listed on their profile pages and on the top contributors list. For example, on my profile, it says that I have a contribution of +16, but on the list of top contributors (http://mirror.codeforces.com/top-contributed/friends/false/page/5), it says that I have a contribution of +15. What is the reason for this?
Some more users that I have noticed with different contributions on their profile and on the top contributors list as of now are Petr, Lewin, and Edvard.