System reserves extra folder names when renaming or copying

Hey, first time poster here who's been working in the IT field as a technician for over 7 years. I've got a weird problem I couldn't find any solutions for on google. In trying to move my 'Users' folder to my new 1 TB Media Drive M: I accidently moved the directory (right click>Properties>Location Tab>Change directory path) "C:\Users\Scott\My Music" to "M:\Users\My Music" where the system MERGED it with "C:\Users\Scott" instead of creating it adjacent to that directory.

After that the system has decided that the directory structure of "M:\Users\Scott" is the same as "M:\Users\My Music" so whenever I move a file or folder to "M:\Users\Scott" in trying to complete the migration it puts it in "M:\Users\My Music" instead. If I create a new folder in "M:\Users" and rename it to 'Scott' the system asks if I wanted to merge the two folders as it thinks Scott already exists, even if it shows My Music.

This problem is not a huge issue and because of other potential problems this may have caused I am going to create a new profile, move my data over, and remove this profile, but I wanted to find out what is causing this, what the solution is, and apply that fix so I am prepared to resolve this in the future