Problem with syncing podcasts

Hi everyone,

I have a list of mp3 music files, labeled history01, history02, and so on.

I upload them into the music section in iTunes, and then I label them as podcasts in their info section, and immediately they appear in the podcast section.

When I sync them into my iPhone, the problems start.

Sometimes only the first file appears, the rest of the files appear only when I delete the first file.

The worst case is when the files mix, when I play history01 I hear history03, when I play history02 I hear history05.... and so on...

Anyone has an idea what can I do?

thanks,

Shai