I just brewed a wheat this morning using 6.6lb of Briess Bavarian Wheat liquid extract, 1 lb of the same but DME, 1/2 lb of oat flakes and 1/2 lb of wheat flakes. A few hours later and my carboy had 4.5 inches of trub at the bottom. I have brewed a wheat before and this did not happen. Any ideas on what could have gone wrong. I imagine I will be lucky to get 4 gallons from this.