Variations in scoring "his nobs" and "his heels"
This is not a common variation that I have heard of, and research on multiple cribbage sources seems to agree that Knobs (starter hand jacks) are always 1 point and heels (or flipped/dealer jacks) are 2 points.

This may very well be a case of a small player group misunderstanding or altering the rules. Rules for games like cribbage can often be changed in the same way that playing a game of "telephone" or telling a story by word-of mouth can change the original wording in subtle or not-so-subtle ways.