Possible bug / possibly doing something wrong on Product Types inport

[nickhails]

A really interesting project and well executed and documented! I was looking to build something myself but this has 90%+ of the functionality I need. We've got a lot of products types - 100+ so was looking to import them manually. Looked at the example CSV and created something along the lines of:

ProductCode,ProductName,Description,Unit
WP150P10,"Wound Filter 150 micron 10 inch Poly core",,pcs
WP200P10,"Wound Filter 200 micron 10 inch Poly core",,pcs
WP20P10,"Wound Filter 20 micron 10 inch Poly core",,pcs
WP20P20,"Wound Filter 20 micron 20 inch Poly core",,pcs
WP20S30,"Wound Filter 20 micron 30 inch Stainless core",,pcs
WP25P10,"Wound Filter 25 micron 10 inch Poly core",,pcs
WP25P20,"Wound Filter 25 micron 20 inch Poly core",,pcs
WP25P30,"Wound Filter 25 micron 30 inch Poly core",,pcs
WP50P10,"Wound Filter 50 micron 10 inch Poly core",,pcs
WP50P20,"Wound Filter 50 micron 20 inch Poly core",,pcs
WP50P30,"Wound Filter 50 micron 30 inch Poly core",,pcs
WP75P10,"Wound Filter 75 micron 10 inch Poly core",,pcs

When I click on the Import link from Product Types it takes me to the Orders > CSV Import page where it's expecting / requiring Order Number and Quantity.

Am I doing something wrong or is this a bug?