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I think it's incredibly interesting how many of these tests reveal that dogs who have no phenotypic bull breed characteristics often have bull breeds in the woodpile. I would hazard that a large percentage of the mutts out there have some bully in them, and a lot of the people so prejudiced against them quite possibly have a bully breed mix laying right at their feet while they curiously condemn the genetics.
Anyway, I hope you and your pup have lots of excellent adventures together!
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or is it the other way around? Are the bully breeds heavily infused with various mutt genes, and so due to some shared ancestors 50 generations up that are non-bully, a lot of false positives get identified.
Also, be aware that these test are fun, but not terribly accurate. Generally with purebreds they can be pretty good but there are plenty of articles out there of dogs of very well known lineage (showline purebreds, USDA research beagle lines, littermates, and sometimes even the same dog submitted years apart) coming up with very incorrect results, and also some rare breeds who were though to have some genetically unique/rare patterns in the 'nonsense' regions of the DNA turns out a lot of other dogs have the same patterns too just not as regular, so there are a lot of false positives for the Entlebucher and shar pai
Visually, I too see ACD, although I'll note that stocky nature of the ACD body type can be displayed in mutts with mostly herding but with bully blood in them.