Mike, I actually had a small amount that molded on me. All were double wrapped so I'm not sure why some molded and some did not. I have two pieces, from my first run of cheese, that was sealed with a foodsaver that are still in perfect condition. These two are nearing the 1 year mark so we will seal in a vacuum sealer from now on.

One thing to note is the packages that molded had more than one piece of cheese in the wrapping. Perhaps the small amount of air that was trapped in the nooks and crevices are what caused the problem.