Try next operation.
1) "admin" > "Stats" > "Delete hidden posts"
2) "admin" > "Stats" > "Recount posts"
3) "admin" > "Stats" > "Recalculate user points"
If you still the same phenomenon occurs, try to calculate manually with information below.
A) Look at several options in "admin" > "Points"
B) Calculate "points" field in qa_userpoints table manually.