well guess what, page-6

from the quarterly:

"During the past Quarter the Company amended its production estimate for the Quarter. This resulted from a mining area producing a relatively small tonnage compared to the original geological model. A very high grade intersection had biased the ounces in a way that had not occurred before. Interestingly subsequent development of the ore body along strike to the west of this area is producing new ounces that may eventually come close to the lost ounces over the last Quarter. This confirms that the Company needs to continue to open up the reef so that there can be multiple stoping panels that will help improve the reliability of production estimates."

the highlighted words indicate to me something wrong with the resource model