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After a user requested their duplicate accounts be merged on Bio, I'm a little puzzled by their reputation.

Account A posted a question which at the time of merger had 2 upvotes, 1 downvote. I make this a net score of +10 -2 = +8. This should make that accounts total rep 9 including the mimimum value.

Account B at the time of merger had 3 answers, 2 deleted of which one had an upvote. Again by my reckoning that makes a total reputation of the minimum 1.

I would expect, therefore, that after the merge the user would have 9 rep as a result of 2 upvotes on questions, 1 downvote on questions. Yet the account actually has 11 rep. Whilst this is clearly a travesty of justice that needs to be fixed as the highest priority, I am interested as to what I'm missing here.

I guess it could either be:

  1. The downvote on the question, originally attributed to Account A wasn't moved to Account B but the upvotes were.
  2. The minimum rep of both accounts is transferred in the merger giving the extra +2. Don't see why this would happen though.

Just thought to check the reputation page (facepalm) and saw that the -2 entry for the downvote is indeed missing:

Missing downvote reputation screenshot

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3  
If the downvote happens before the upvote it never takes new users into negative rep. – Martin Smith May 20 '12 at 11:56
    
Ahh so the post merge recalc is done in chronological order? – Rory May 20 '12 at 11:58
    
I guess so, seems correct that merging should yield the same result as if the accounts had been one all along. – Martin Smith May 20 '12 at 12:02
2  
@Rory Yeah, once the users are merged, all votes are processed in the same order they would've been if they were on one account to begin with. – Adam Lear May 20 '12 at 12:10

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