Hi!
It's remind me a siamese plant I've got once with a BSF's Gorilla Glue Faster seed.
At first it looked like a poliploid or whorled phyllotaxy mutations, but during the vegetative phase, the trunk just forked in two totaly normals stems.
Unfortunately, one of this steam suddenly died before flowering. But I still had a great harvest with the other half.
Anyway, poliploid and whorled phyllotaxy mutations are fun to watch. So enjoy your grow. ^^