came up with a grade of 12.77 g/t for the Riddle Till when in a previous press release they reported a grade of 0.244 g/t for the Riddle Till.

The new release does not even provide a description as to how they derived the grade of 12.77 g/t nor do they provide a QP who is responsible for that estimation. The older press release does provide a QP and a description how the sampling was conducted.

Did the managment make a big mistake??

here is the link to the old release

http://www.goldenbandresources.com/html/news/press_releases/index.cfm?ReportID=80480