taxonomy auto-path views path issue
I think your problem lies in the fact that you are using the same URL for both a view and a node - this is a really bad idea in most circumstances.

If you always want the view to show - what does it matter if the taxonomy itself is at /category/tag/[term:name]?

You might find Page Manager useful for what you're trying to do, there's a fantastic free tutorial and familiarisation set of videos that have helped me immensely of late.