It could be from genetically reproduced hybrid Habaneros with less heat.
I was sampling a bunch of different pepper jellies and sauces that were supposedly Habs and none of them were off the heat scale. I wondered about them too, I felt like I was at a Fireworks stand instead of a Farmers market, one guy said "you lookin' for more heat?" and pulls out a jar from under the counter, claimed it was nuclear-it was a dud!
Brian