[_Zelph]

Yes, I saw this the other day and thought the same thing...

... but I wouldn't be alarmed. It's obviously one of those little music/beat makers that come on music keyboards or some pieces of software. All you do is change the keys and it fills in the rest for you. I've done the whole music thing for a decade now and have heard hundreds of these. Most (if not all) of the "stef" midis seem to have been made this way. This also explains why other people would think they were stolen from other places although they're not completely identical. It's just canned music where you fill in a few blanks. Of course it's going to sound the same.