You accidentally have two players that are the same. You can merge them together and all of their stats will also merge.
Go to Players (Menu > Manage > Players/Teams > Players).
Find the duplicate player.
1. Select both players. (select one, Hold CTRL and select the second one)
2. Click on Display More Options (Top right)
3. Click on Merge 2 players.
In the pop up:
4. Choose your Source: the player that will be copied INTO the Target Player.
5. Choose your Target: the player that will remain (Spelling, Operator, etc)
6. Ok.
