I'm sorry if this is mentioned somewhere in this post, but I can't find it.
I want to use EP to upload products to multiple SUB-categories.
So for example ... a comic book...same book needs to go into two sub categories...

The book: Marvel Comics - Captain America

By Publisher (Main top level Category)
Marvel (Sub-Category)

By Title (Main top level Category)
C (Sub Category)

I can't figure out how to do this, or IF it can be done, using the columns in the exported file.

Thanks in advance.