Score editor won't divide

I’m happy with the Score Editor in Cubase Pro 14, but there is one little problem that I can’t figure out. When loading it in a midi track, I get two notes together. This is after making sure that no midi notes overlap. These are eighth notes, which is how I have the quantization set. I’ve tried deleting one of the notes, then get that note followed by an eighth note read. What I want is the two notes to follow separately in their own pitches. Any thoughts?