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I had 5518 re, but when I refreshed the page, it suddenly dropped to 5508. How?

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up vote 11 down vote accepted

It is probably because someone who previously up voted one of your answers subsequently removed the up vote.


This is also true for Accepted answers. If your answer is marked as accepted you will receive +15. However, if the OP changes their mind and marks a different answer as accepted then your Rep score will decrease by 15.

There isn't really any way to know which questions/answers these events occur on - unless you memorise all of your answers and upvotes.

See this comment from Grace Note

It is not shown as a loss. It is shown as the removal of the original gain. So unless you've memorized which ones of your answers are accepted and every vote, it won't be easy to find it.

from this question I posted a while ago

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wouldn;t it be a downvote? – Jigar Joshi Oct 13 '10 at 7:19
2 No. After someone votes up or down, they can remove that vote within a time window. So it'll be as though they never voted. In other words, if someone upvotes your answer then someone else downvotes your answer you get 10 - 2 = 8 net reputation. Someone voting up or down then removing that upvote gives nor take any net reputation. – In silico Oct 13 '10 at 7:22
<typo-correction> Someone voting up or down then removing that vote gives nor take any net reputation. </typo-correction> – In silico Oct 13 '10 at 7:27
@Insilico, it's not exactly "as though they never voted." The system still remembers that a vote was cast at one point, and won't let the users re-change the vote on that post unless/until it's edited.</nitpick> – Pops Oct 13 '10 at 16:16
A bit of an update from my earlier stuff; on your own you can't confirm whether a specific post has had votes withdrawn, but you can confirm whether a specific answer has been unaccepted. If you check out the timeline view of a question, it will show unacceptance like in this case. Of course, it doesn't make it easier to find, simply it just lets you confirm if or when you do find it. – Grace Note Oct 13 '10 at 16:26
@Popular Demand: Right, which is why I didn't say "exactly as though they never voted." :-) The result is similar though, save for the extra detail you mentioned. – In silico Oct 13 '10 at 19:47
@Insilico, okay. Your comment was good, but there have been posts on MSO complaining about that behavior, so I wanted to point it out. – Pops Oct 13 '10 at 20:05

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