I check the total reputation point of my profile on stackoverflow. Yesterday it was around 2400+ and when I open today it become 2090.

Yesterday Reputaion is 185 and in reputation tab it shows 55 only.

In the above image you can check that on Feb 17 to till date manu reputation added to my profile I am attaching the screenshot taken on Feb 18.

Feb 18 reputation

On that day my reputation was 2070 and after adding these much points it become 2090 only?

I check the other question related to this but it shows cache problem. But cache can effect yesterdays result not more then that i think but in my profile it shows status of last week i think.

I got sqlalchemy tag before 3 days and now that is not in my profile.

  • Why do you think it's a bug? Do all of the numbers listed in the "Reputation" tab add up correctly? – Cody Gray Feb 29 '12 at 4:39
  • If i will add without bug then it gives error like Oops! Your edit couldn't be submitted because: must include one of these tags -- 'bug feature-request discussion support' users with less than 500 reputation can't create new tags. The tag 'bugreputation' is new. Try using an existing tag instead. – Lafada Feb 29 '12 at 4:41
  • Your accounts page shows 2,598 reputation but your profile page says 2,098. You may have gotten recalc'd, or maybe you lost a +500 bounty somewhere? Who knows, but you lost 500 reputation from something (or maybe multiple things). Edit: Your accounts page has since updated to the new value. – animuson Feb 29 '12 at 4:48
  • Do you know any rule or something which will reduce 500 points ? Even my bounty tab shows 0 bounty :( – Lafada Feb 29 '12 at 4:51
  • @Lafada: If your old posts have been deleted, you'd lose any reputation you gained from them. Perhaps you've answered a few questions which were closed as too localized, not constructive, etc and then subsequently got deleted? – animuson Feb 29 '12 at 4:53
  • Shall i check which posts are deleted which I answered ? Or is there any way to check the deleted activity? – Lafada Feb 29 '12 at 4:54
  • @Lafada: Currently, that's not possible. Unless you have a photographic memory of everything you've ever posted. However, there are upcoming changes that will make this information visible to you (whenever you lose reputation due to deleted posts). – animuson Feb 29 '12 at 4:56
  • So there is no way to check where I lost my 500 points which shows in account page but not in my profile page ? – Lafada Feb 29 '12 at 4:57
  • 1
    @Lafada: Only an SE staff member would be able to check for you. I'm sure when they see this someone will take a quick peek and tell you where it was lost. – animuson Feb 29 '12 at 5:00
  • let us continue this discussion in chat – Lafada Feb 29 '12 at 5:02
  • be patient... Soon you'll be able to see how much you lost from deletions, un-accepts, etc. – yhw42 Feb 29 '12 at 5:03
  • I have to add any tag to this post so SE staff will look into it or they will do automatically ? – Lafada Feb 29 '12 at 5:07
  • I got sqlalchemy badge 3 days ago but now its not there :( My upvote for sqlalchemy was more then 100 and now its 79 only :'( – Lafada Feb 29 '12 at 11:06
  • @NickCraver there might be but I dont have any query now :) No I dont want to discuss in public :) – Lafada Feb 29 '12 at 11:36

There are a number of reasons why this could be happening:

  1. You've had some answers deleted - as you've noticed with your tag score reducing - which is why you've lost the badge.
  2. You were the "victim" of a serial upvoter. Someone who went through your profile upvoting your answers because of who you were rather than their content. These votes are detected and removed automatically and a reputation recalculation is performed.
  3. As Nick points out in his answer - When fraudulent votes are removed, a reputation recalculation is performed.
  4. There are changes in train to keep your headline reputation in line with your real reputation which means that your reputation will now go down as well as up.
  • yes but is there any way to check which answers are deleted ? – Lafada Feb 29 '12 at 11:24
  • @Lafada - the new reputation pages will show you this - but I don't think it's rolled out fully on SO yet. You're seeing the the initial stage where everyone's reputation is recalculated to get a consistent baseline. – ChrisF Feb 29 '12 at 11:27
  • Thx @ChrisF I am accepting answer and hopping that i will not lose my 500 reputation again :). – Lafada Feb 29 '12 at 11:28
  • @Lafada if any questions or answers are deleted you will lose reputation. It just won't be hidden any more. – ChrisF Feb 29 '12 at 11:29
  • I was wondering because in single day these much questions deleted from sqlalchemy :) – Lafada Feb 29 '12 at 11:31

When fraudulent votes are removed, a reputation recalc is performed.

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