I would look at the situation a little more simply. The OP has no history of similar posts; perhaps no one checked 
, and this case was noticed purely by chance since I saw a very similar text from different authors.
This is what I am thinking. It would have been better if one more post that he posted was also just like the mistake he did. This would be the best evidence that he is plagiarizing and he should be banned again., and this case was noticed purely by chance since I saw a very similar text from different authors.