The dried coffee beans are run through a commercial grinder which uses a blade or a burr to grind them into various types of coffee from coarse to extremely fine.
It could be for a couple reasons: The coffee filter being used is the incorrect size for your coffee maker.The ground coffee could be too fine for your filter or type of coffee makerCould have too...
At 8oz a cup, 8 cups would be 64oz. Figure 4oz of coffee for every 64 oz of liquid. For an easy rule of thumb, I use two slightly rounded dinner spoons per cup of water.