Can’t import additional categories

I successfully imported one Colllection/Category and was attempting to finish importing all of the others. When I attempted to import another Category, it assigned the additional Category to every existing imported product and wouldn’t import any new products in any other Categories.

I read that I needed to import products before importing Product Categories, however, I had already set up all Categories. I deleted them and tried again. Same result. And, I have to have the Categories in place for my Shop page to work.

Now, I can’t import any additional products other than the one Category that already exists. It keeps importing the same 98 products every time.

How can I import the products from the other categories?