On the Reputation tab of my ServerFault user page, I found that my answer to the question "How do I decide what type of hardware to use for a firewall?" received four upvotes yesterday. As you can see, the grouping isn't working quite correctly: instead of showing the question once with a summary reputation gain of +40, it is shown twice. Each summary heading reflects a net reputation gain of +20, but the sub-entries underneath that value do in fact add up to +40.
Each question should be presented once per day, with a single summary heading reflecting the total reputation impact.