You have SUCH a cute puppy! She looks like part Basenji to me...our first adopted puppy was supposed to be"half shepherd, half collie" As she grew our vet said "no way...she's part Basenji!!!" and that started us on our lifelong love of the breed!!!! Wishing your pack health and happiness.
DNA is not exact, but at least for the main parts, it is. Sally asked why does it matter... but it can help so you are aware of common health/genetic issues.
As for conjoined toes, lots of dogs have them, but if a breed standard for any, I can't find it. I found a gazillion forums (okay not a gazillion but lots, including retrievers, shelties, labs, etc) with people showing their dogs' feet and asking others. Most breed boards said happens, not common.
I noticed a lot of the dogs with joined have hare-feet (elongated middle toes), but the basenji standard calls for
" Feet-Small, oval and compact with thick pads and well arched toes. Dewclaws are usually removed"
Breeds with hare feet include several of the toy breeds, Samoyed, Bedlington Terrier, Skye Terrier, Borzoi, and Greyhound.<<
She's very cute. Congratulations.
Keep in mind that Basenjis are not that common, which means a Basenji mix would not be that common. That said, the down ears don't necessarily mean anything unless they're never up, and the ears are up in the other shot. So it's possible. The markings are definitely right.
As suggested, if you really want to know a DNA test will be a lot better than guesses.