Possible Bug in Product Importer – Categories, Hierarchy

Hello and thanks in advance for any assistance!

Issue – Upon import, product is not placed in parent category as expected.

To get a baseline, do this:
1. Create a product, add a new category and child category, place product in both categories.
2. Export record.
Result – In export categories field you should see something like:
Category A, Category A > Category B

To reproduce the bug:
1. Create a CSV file for a new product import.
2. In categories field include two new categories, parent and child:
Category 1, Category 1 > Category 2
3. Import record
Result – View product page, Category 1 and Category 2 are both *created* but the product is *listed* only in Category 2

Interestingly, if you re-import the same record as an update, the product is correctly listed in both categories.