I was looking at a user's reputation tab https://stackoverflow.com/users/1437962/elyusubov?tab=reputation
There is a serial downvoting happened on 20th June date( total 28 downvote at 02:48 hours ). Have a look at the screenshot.
Now these downvotes are reversed with +60 points ( which should be 28 X 2 = 56 points ). So how come this +4 reputation awarded extra ? is it a bug while re-calculating the downvotes ?