Hello Ssj Magikarp.
I'm sorry about your 20 point loss, but that is just how this site works. If you get an upvote you get 10 points, if you get a downvote you lose 10 points.
I've completely rewritten this answer to list the exact points you get for each thing, since it's changed many times since this question was asked. Here we go.
- All users start with 20 points. Think of it like a sign-up bonus ;)
- If your question or answer is up-voted, you gain 10 points.
- If your question or answer is down-voted, you lose 10 points.
- Having your answer selected as the best gives you 20 points.
- Selecting an answer as the best on your question gives you 2 points.
- Down-voting a post loses you 2 points (this is to discourage people downvoting for no reason).
- If a post is hidden, points gained from upvotes are lost, but points lost from downvotes stay, they do not come back. However, the -2 from downvoting gets returned eventually I think.
posted by Pokemaster May 22, 2010
Also this could be useful for you.
Still have questions? Just ask them in the comments and I'll answer them.