Only some podcasts transfer from iTunes to iPod


I'm having trouble with all my downloaded podcasts transferring to my iPod mini. I've got the "Update all Podcasts" option checked.

I'm also finding that podcasts I've listened to don't always delete from the iPod, even though I have that option checked as well.

Finally, when I click the name of my iPod in iTunes it doesn't show any data in the window, even though there are podcasts on the iPod.

Can anyone make any suggestions of where the problems lie?

Thanks in advance,