There seems to be some problem with my reputation. I have received 2 upvotes and the OP accepted my answer, but this is not reflected on my account.
As Mad Scientist wrote, you didn't get reputation because your large number of edits turned the answer into community wiki.
That said, we have pretty standard ways of dealing with 'undeserved' automatic conversions on this site. In the future you can just flag your post for moderator attention with a request to de-wikify. We will look over the edit history and make a judgment call. If, as in this case, your edits were bona fide attempts to improve the mathematics (and in your case many are just barely outside the 5-minute successive edit interval) instead of 'excessive bumping', we would remove the CW status from the post (and also protect it from future automatic conversions).
Of course, one way to avoid all these hassles is to make sure each edit fixes as much as possible. (That is, make large edits in batches instead of many small incremental ones.) That said, we are only human.
The answer has been automatically converted to community wiki because it has been edited more than 10 times. This means you won't gain any further reputation from this post.
This is not a bug, but an intentional feature designed to discourage excessive bumping of posts to the frontpage. It's not a very intelligent mechanism though, and can't distinguish between a user heavily updating their post multiple times, and a user making irrelevant changed to bump a post.
Reputation takes a while to update sometimes where wiki status is concerned.
In your case... your second reputation recalc did the job:
You can also see the rep changes in your reputation history: