Best guess - mis-labeled plant. Don't know how they could claim heirloom and F1 combo- Better Boy unless it is a grafted stock plant. Maybe they used BB root stock with some heirloom cherry graft? Never heard of it being done but with all this "organic" and "grafted" hype floating around lately it could be anything. Call the vendor.

But yeah, those aren't BB tomatoes.

Dave

It could be the sweet 100, it's probably mislabelled.