Hello,
Depending from what DO finds in folder it changes columns headers. ( music -> name, track, album ...)
Where can I "force" the header to different headers if DO makes the "wrong" choice ? 
Thanks
Cheers
The best approach is to have a look in the FAQ, where the content type detection is also described:
The Faq, yes, but I didn´t used the right terms 
( Content detection )