Backfiring on Voldy in Chamber of Secrets

Here is another set of things from recently listening to COS recently. First is that in an earlier post I had been noting the correlation between books 2 and 6 in the chiastic structure and been noting that I think the fact that the "eat slugs" backfires in book 2 is an indicator that Slughorn backfired on somebody, either Voldy or Dumbledore, in book 6. I am now pleased to announce that I am pretty sure that Sluggo backfired on Voldemort. I say this because in COS Ron had one final relapse of puking up slugs, later that night, while in detention helping Filch clean trophies in the trophy room he pukes up his last few slugs ... all over Tom Riddle's trophy for special services to the school that he got for "catching" Hagrid. The second thing also involves Riddle, maybe even a part of Riddle that isn't wholey perverted by Voldy's corrupt ego (but I'm less sure on this part being any purer than anything else about Riddle.) I think there is evidence in COS that Harry's scar is indeed a Horcrux. We hear about Ron's puking slugs on Riddle's trophy when they find the diary with his name on it ... and it is also at this point that Harry is described as feeling, when he reads the name, like it is the name of maybe a friend he had when he was little (which he knows could not be because the Dursley's made sure that he never had any friends.) This feeling is what makes me think part of the soul went into the scar. He never has this feeling when he hears Voldemort's name - which is what makes me think that maybe there was a process in which Voldy's ego corrupted his soul, but the soul in and of itself, apart from the ego, is not as evil - that is not to say that it is pure as the driven snow, I would imagine it being at least confused and a bit irrascible - but maybe not as malicious, and maybe baby Harry, in childlike simplicity of good emotion, tried to befriend the new person on the front of his head. We're talking about a "piece of a soul" here, not a whole person living in a body, and so naturally Harry could not befriend him and so as he develops past the age of concretely self-reflexive thought he forgets about that experience, except for little encounters like this. Of course, this raises another COS question - the Diary is never referred to by Voldy/Riddle as a piece of his soul, but rather a piece of his memory ... and it is precisely Ginny's soul that he is siphoning. My best guess is that Horcruxes are not an exact science and difficult to get "right." Maybe Voldy intended to make a Horcrux, ie part of the soul, and really dumped mainly a copy of his ego with a smaller piece of soul, just enough to animate a book? ... Not Sure.