I recommend going back to the original (updated) post and read it again, and look at your channel in the light of everything mentioned. In addition, in that post Leo indicates the purpose of the post is to educate, he is unable to help individual channels gain monetisation.
I can potentially see your channel getting flagged for "Video Spam" in light of the definition in the original post.
This is not "Team YouTube" it's Creatorhub.net
I'd re-read the section under duplication. There is mention of a music promotion channel, which "may" apply.
As long as you still have the numbers when you re-apply, you'll be fine. You won't need to start from scratch.
I believe, on my understanding of the policies presented, that your channel overall needs to be compliant with the YPP and other policies. So if "most" of your videos are not monetisable due to this broad duplication rule, then that would likely end up being a rejection again. The primary purpose of the Partner Program is monetisation, if your content if not monetisable, then logic dictates you'll be rejected.
Click on the Monetisation tab. What does it say?