Interesting investigation, especially if you check trust of these accounts there is already a
reference, from February 14, which lists all these accounts. It looks like you just used my post and got from your main account SM23031997 merits for "quality post".
Sharp eyed hawk you are! A well busted catch. Or a well caught bust. Whichever.
Looks like this is something to watch out for. Plagiarism of merited posts.