They were referring to a backlog.
ie On Tapas (or another site) currently is a finished arc that is 50k words long, but the story isn't finished, and you have 80k words ready to be released that are sitting in the Schedule feature. So 50k of the story is public, and another 80k the public has not seen.
No, they did mean "would not". They simply meant that "just because you have a well-plotted outline and know where you're going does not mean that novels submitted to us with poorly organized outlines will be rejected." In that sense, the outline is important, but the organization or "fullness" of it is less so. They just want to see where you're planning to go moving foward.