It's not weird, it's intentional, and desired. The short and to-the-point answer is marginally more helpful if it arrives sooner, because it solves the problem quickly, so it will tend to earn a little more reputation. Coming back later and embellishing the answer with details, sample code, whatever, and you will earn a flood of well-deserved reputation. Doing both--providing a quick answer and then embellishing the details so that the Internet has a great resource--is the ideal outcome and therefore rewarded with the most reputation.
I tried to do incremental editing of a self-answered question. As I was editing and improving the post, within 30 minutes of originally posting, my question was closed for not being a real question. Which was true, the original question was a problem statement.
I continued to improve the post, including the feedback from downvoters. However, I had to flag the post to have a mod reopen the question and none of the downvoters have returned to modify their vote.
It's annoying to end up with negative feedback after attempting to be helpful and taking time to improve a post. Maybe encourage closers to come back after a post is reopened?
