Good heavens. +/- 6 semitones is definitely transposing and not pitch correcting. I didn't listen to the samples you posted yet but using it for vocal pitch correction it would normally be more in the cents rather than semitones.

I only have Essentials and learned by watching tutorials. If it's used correctly and that's the big IF I think it's transparent enough. Used incorrectly it's clearly audible but imho so is most everything else. I haven't seen a program yet that doesn't have issues on some systems and there's always that learning curve.

I'm sorry to hear you've had so many problems with it. That is frustrating. Luckily with Reaper, I've had no issues with the program itself.

Josie