Because currently, it seems like the only thing it’s recording are downvotes. Meanwhile upvotes are completely ignored, leading to pretty much every profile I see having a negative reputation.
Also, I have a very fragile ego and my -6 reputation hurts a bit.
That’s just the current state of the software, not the intended state of the software. There’s a bug right now, reputation’s not supposed to be calculated that way. It’ll get fixed, there’s just rather a lot of higher-priority stuff in flight at the moment.