I'm the Darth Vader nominator--it was mostly done out of habit, since often even exchanges which put all of Star Wars together will allow separate nominations for the character in this way. My understanding, based on how I've seen other people discuss it, is that it's worked out this way because he's known as mostly one or the other in two different eras, and their separate canons, so this provides some guidance as to what the requester/offerer is interested in. I hadn't realized it would be different here, and have now removed those. It works for me either way!

Jedi Fallen Order falls within the new continuity, in between the prequel and original trilogies.