Could be, but it's also not uncommon for plagiarists to try to stay on topic by copying something from earlier in the thread.
Do you run a bot or something that helps you find plagiarised posts? You are always the one to find them and very quick. Share your secrets sempai.
All the more reason for this user to be given a temporary posting ban and a signature ban for 2 years. Recently they have become a net positive for the forum and I don't think we should banish this user to the dog house forever.
I'm not really in support for the ban for users who are above Hero+ and have 1 or maximum 2 posts copy-pasted. Like in terms of signature gains, how much they would have made copying the two posts? If the posts are from 2017 and less then they should be given another chance instead of a perma-ban. It's sad to see a legendary member getting banned for copying one post in 2016.