Tried deleting Savedvariables? (WTF, Account, [Accountname]).
Then press CTRL+F and search for Recount, delete everything you find.
Done and done (the first time). Did not remedy the issue.
This isn't related to missing death logs. Usually those are caused by the death event simply not registering (and this is confirmed by the combat log). My problem is the death logs are just wrong (and sometimes for a completely different person).