This is just my thoughts. No real experience.

I would say two explanations. One the dog is bred like advertised. The only thing is that there are several different breeders involved. This where nature and nurture come into play as well one guy might be looking for a slightly different trait than the next. Maybe Mr. Durant was looking for one of those all night dogs. TVK added a shot of Eli that carried heavy into those dogs that look very heavy Red Boy. The Swinson and Lanier dogs were heavy Red Boy but could really shut it down. So just looking at the pedigree one would say Cottingham/Red Boy. Break it down breeding to breeding and there are some considerable differences.

Secondly, as you say, there may be some inaccuracies in the pedigree.

Interested in the responses.

EWO