A few months ago, I started 4 types of tomatoes. One of them was Rutgers, one of them was Brandywine.
In late April/early May, I up-potted them. A while after that, I noticed that one of my Rutgers was clearly potato-leafed like the Brandywine. So obviously, I screwed up my labels when I transplanted.
Fast-forward to now, and I have 2 big PL plants. One of them appears to be a Brandywine like the ones I had the last two years, but the other (originally labeled Rutgers) has a ton of flowers already. There's no way a Brandywine would flower this early. So it's neither a Brandywine nor a Rutgers. The other Rutgers I have is regular-leafed like it's supposed to be.

So I assume I didn't screw up the labels, and I got an oddball seed in the seed packet.