Does the player skill bonus stack for trainer?

Since the trainer skill stacks, if I have 2 in trainer, then does that +1 apply for each companions trainer skill (multiple times), or just once?

I'm asking because there is a green number for the trainer skill level on my character.

Submitted July 29, 2017 at 01:50AM by jumpsconclusions http://ift.tt/2v6c6ze