Hello.
I've been struggling for days with a particular subject and now I come asking for help.

This is my scenario in a test site:
I have a taxonomy vocabulary named: Colors
Colors terms are: Blue, Green, Yellow.
These terms apply only for blog entries, so I did a test adding two posts for term Blue, two posts for term Green and two posts for term Yellow.
The resulting URL aliases are: (generated by pathauto module and configured for my specific needs)
colors/blue
colors/blue/first-blue-post
colors/blue/second-blue-post
colors/green
colors/green/first-green-post