Congratulations! Yes, I've had some branching on my seedlings. Per my experience if you have 3 branches the middle one tends to be more dominant and would be the first to bloom.

From the very little experience I have had, branching plumeria seedlings seem to be delayed in blooming. They tend to put more energy into forming branches than flowers. Branches really need to fatten up to bloom. When they branch a lot, they don't fatten up as quickly.

But I guess you'll know in 3 or 4 years.

Thanks for the feedback. Will update you in 3 years. :)