As a workaround, you could probbly create the categories first and then only import the bottom category (94112).
I don’t think there’s any difference in functionality between checking all the boxes and just the bottom one, except how the boxes are displayed on the screen; in both cases the post is considered ‘assigned’ to all the categories.
Is that correct?
Still, the plugin should probably only select the bottom category, since that’s how WP does it if you edit the post manually.
I’ll take a look at it later today and provide an update if it’s a quick fix. I’ll also try add the image URL feature you requested.