We've recently implemented a number of hotfixes directly related to guild achievements, flasks, and cauldrons. When first designing the guild achievements, we overestimated the number of flasks that guilds would be able to make by the time they reached guild level 10, and set the number of Cataclysm flasks required for the two related guild achievements to 10,000 (Mix Master) and 25,000 (Better Leveling Through Chemistry).