In the case of Victor’s nomination, I added @Senthil shortly I created Victor’s nomination. Senthil asked me to list his nomination, too. There are other cases, e.g. @ambv’s nomination has Brett and Guido as nominators. I know that @ncoghlan and I both asked another person on the same day.
I don’t see any harm to have one or two nominators listed, but not more than two. The nominator list shouldn’t turn into a pre-election.