Northern Dawn Triplet

Bought a few Northern Dawn seeds from HCC. One of them is a triplet. I know (or think) that the two smaller ones are likely taking from the main plant, but I just couldn’t take them out. Now they’re about 4 weeks old and the smaller plant looks very different. Thoughts?!?

More pics…

The 2 on the sides look like a type of fern…I’ve seen these grow in my outdoor plants