"Shared" is when you quote or link to an article.
"Plagiarism" is when you copy the entire article and paste it to your blog as if it were your own, which is what you did, and it wasn't until now that you've explained that it wasn't even your article. #odd
At this point, I don't really care which it is, your account has so many red flags it's not in the League's best interest to allow such accounts in.