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If I search for user in Users page it displays old reputation of the user.
But original reputation is :
Because you are searching in Week tab. Use All tab instead. Search result in Week tab. Search result in All tab.
In Week tab it show only current week's reputation. In All tab it show all time reputation.
The Users' page shows reputation eared for the specified time period that was selected(highlighted indicates the period that is selected)
Click on the "All" period to show the cumulative rep, instead of rep earned for the highlighted period