I use Autoblog 3.9.9 on a Wordpress 3.51 Multisite setup, with no other plugins, except Akismet.
In my multisite Network Admin, when I add a new feed via "Add New", I enter all the requested information like new feed "Your Title", "Feed URL", "Add posts to" ...
I want to import the category from my feed as well, so, in the next section "Categories and Tags", the first option is "Assign posts to this category", and there I get a dropdown menu with the actual categories of my blog, the option "None" is not available in that dropdown menu at this time.
I want to select "None" because Autoblog does not have to assign a category, the category is already in the feed, so that category should be used.
The second option is "Treat feed categories as", and I select "categories" in that second dropdown menu.
Now I have to save this new feed, and Edit it again, and now the "None" option appears just fine in the "Assign posts to this category" section. Save again. Everything works fine, the original category gets imported just fine.
Why does the "None" option disappear when adding new feeds?