[JMikeD]

I see that many folders in my Calibre library folder have the author names in two formats, such as:

Gaiman, Neil

and some have the form:

Gaiman_ Neil


Calibre seems to list and sort everything correctly regardless of which folder the books are in, so this is a question that has no practical application, but I'd just like to know why. This is in Mac OS X, don't know if it happens in Windows or Linux.

Mike