I don't think that Parker's sauce has any ketchup in it. It may have some Texas Pete or something similar.
I think that eastern NC sauce has changed some in recent years. I think it is not uncommon for some to add a little ketchup nowdays although years ago it was unheard of. I don't know of anyone that adds chipotle although it is probably good.
Fired Up Smokers KCBS Team, Smokey W's Pit Que NCPC Team / 2011 NCPC Whole Hog State Champion