Changing columns affects ever folder

I want to show MP3 data in just the folders that have music in but when I change the column options it changes them for every folder on my system. Any ideas what I'm doing wrong?

Go to Preferences, Folders, Folder Formats and have a look at what your various folder formats are.

The Custom one under Default Formats is most important as it's used as a fallback when no other format matches. Check the others as well, though.

The best way to get music columns automatically is to use the Music format under Content Type Formats, assuming you have not disabled the Content Type Detection system on the Options tab.