This form of writing whitout SNPs like "J1b1a1" is confusing and outdated, at the time his clade might have been considered J1b but on yfull it seems to be downstrean of your "J1a" branch?https://www.yfull.com/tree/J-Z2215/
To avoid confusion focus only in the first letter and terminal snps.These nomenclatures even changes from time to time,from 2011 to now, E3b for example is not used anymore, its all E1b, some I2b turned into I2a2, and so on.Anyway his thread have more of the samples i told you.

