Smokepole,
I forgot to add,,,,,
The jar that didn't seal for you.
Try inspecting the jarlip after you've consummed the food and the jar is sparkling clean. Could be a baaaaaad jar lip???

U kno, all those Canning Jars can be frozen too. I'd advise just using Widemouth Jars for freezing. The Smallmouth Jars tend to break when food swells during freezing.
nohunt