I bought a jar of Emile Noet mustard, and when I opened it the top almost blew off and mustard ran down the side of the jar. What was inside the jar expanded upward and stood at least a quarter inch above the top of the jar. As for the lid itself, it had more than a quarter inch of mustard stuck to its bottom side. In other words, I had about 1/2 to 3/4 of an inch more mustard than could fit into the jar. What caused this? I'd kept the jar in the fridge after getting it home, even though I wouldn't expect that to be necessary. I decided it might have gone bad and have some dangerous material in it, so I chucked the whole thing. Later I bought another jar, and when I opened it, it did the same thing. Is this standard procedure for good mustard from this company? Did they have a batch that went spectacularly wrong and is killing unsuspecting consumers across the continent? Should I stop buying this brand? I can't afford to keep throwing out new jars of mustard!