Not sure what you mean by "the exact same address"? At least from what I've seen "Documents" always points to exactly one folder, and explorer shows only a view of that folder?
I've had two separate "Documents" folders on a few different machines before. I never used those folders, but they both showed up in my home directory and could contain different data.
I'm sure they were something different if I dove deeper in cmd, but I never cared enough to figure it out.
I had libraries hidden, so I had to check: there's both: the Documents folder, and a library that contains just that folder by default. So yeah, that seems unnecessarily confusing.
