Hi Yvette, I just ran the import and it seems to work fine in the test environment you provided. For ease of use I have reduced the amount of attributes to only 3 including the 2 necessary for the variable products.
As for the uncategorized category, I wasn't actually trying to delete it, I just noticed that I can delete it in our own environment, but I cannot in the test environment.
I assume it should be like the test environment, where I can't delete it.