Media cache in several folders

My media cache only, as far as I knew, was in one folder location. Now, I am finding the ridiculously oversized audio files all over the place, which is utterly destroying the free space on my C drive. I don't know if this is a bug, but I never used to have this problem. 

Currently, I have found in the hidden folder in the main user "AppData" folder under "Roaming->Adobe->Common" in the "Media Cache" and "Media Cache Files" (where it's always been) and also under "Peak Files." The strange additional location that I have no idea why it's putting them there also is under the "Public" user folder in the "Public Documents" folder ("Media Cache" and "Media Cache Files).

I have a few questions:

1) How to I find if there's any other places Adobe is putting the files? I need to DELETE these space sucking monsters if there's anymore any place for old projects.

2) Why is Premiere making multiple files of these giant sound files and putting them in multiple locations? How do I make sure it stops doing this?

3) Why are the sound files so ridiculously large anyway? Can I make them not be? Better yet, can I make it not do this at all? I really don't understand why Premeire makes these secondary sound files instead of just using the actual sound on the actual footage. If it has to do it for some reason, it at least shouldn't need multiple copies of the same sound file (it never has before - this is a recent issue).

4) Can I move my cache. I want to get it off my C drive entirely and have it all in ONE location on my much bigger D drive.

Thank you.