if you have a limit of 20,000 points can not overcome these items added since the administrator
The error occurs when your limit is 20,000 points and you have 20,001 or more
in customers_points.php As points are inserted by hand, you would see where is the limit and award points to the maximum allowed. Example: If you want to get 17,000 points and the user has been reduced by the 3500 stop-over 500 points to the ceiling "20000"
excuse my English I hope to help