Weird iTunes Problem

I have a strange problem where my music library is stored on my home PC but podcasts keep being downloaded to my NAS.
This causes no end of grief as iTunes keeps complaining it can't find the files (pod casts) initially.

Any idea on how to fix it so everything is stored on the PC?

Things I've tried so far:
Use the ;Let iTunes organize my library; option
Used the ;Organize my library; option in iTunes - This copies everything to the PC, but then new episodes are stored on the NAS.


Its driving me crazy, any idea how to fix it?