Podcasts don't show up

I have downloaded a variety of podcasts in the form of mp3s. I transfer them into my Itunes (current version). I was having a difficult time finding them so i added a new sort field, date added, thinking this would allow me to see what i had just transferred. The problem is that only one or two files show up when I transfer 4 or five. Somehow there is a limit of how many I can add? or some kind of sort field that I created to limit these transfers. I cannot figure out what it could be. Any help would be appreciated.

Thank

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