Problem with replay on Podcast app

Hi,

Having now iOS 7... I downloaded podcast, as it is impossible to use Music to download and play podcasts.

I downloaded a few podcasts and was able to listen to them with no problem.

However... Once a podcast play is finished, its text description in the list turn from black to gray and I cannot play it anymore.

I couldn't find the right setting to avoid that and would appreciate help.

Thanks,

Colbo