iTunes sort by Grouping does not work!

[eclipse]

Hi all,
I hardly listen to music: I'm a podcast junkie.
I listen to lots of podcasts.
I want to sort them all according to my Groups. Instead of seeing all my different podcasts, I'd like to turn all off except for my Greenie podcasts. Or my Science podcasts. Or my History or Writing podcasts.

Basically, I remember being able to change the view so I could only see a certain Group of podcasts in my view. (I manually label each podcast channel/ show as "Science" or "History" or whatever I choose in the Group section under Get Info). I used to be able to select just Writing... but can't since upgrading to the latest iTunes.

Help?

 

[eclipse]

Grouping individual episodes or songs helps you find stuff you've already downloaded.

But being able to sort all your podcast channels by group helps you find the new stuff you don't yet know you want to download, and it would help me find it fast! Does this make any sense?