this is correct. keep in mind that in the last century cream legbars or legbars were bred to production white leghorn to encrease productivity. so the B2 barring gene is also present on some cream legbar lines, at least the most productive lines which are bred for egg layingWow...it took a lot of work to get to the bottom of this one. Nice work!
I know this isn't a Jearhon Thread or Genetics Thread, but out of clarification, the Dark Jearhon variety has the B2 barring of white Leghorns and and the Light Jearhon has the B1 barring of the found in Plymouth Rocks?
Likewise the barring producing the light cockerels is the B1 barring and the barring producing the bark cockerels the B2 barring?