Hi Steve,
thanks for so fast reply…
I really can’t understand what’s happened but now is absolutely impossible to reproduce the “error”.
It was enough to edit and existing page, change just text for example, and then save (update) modifications and automatically PagExp add the expiration date. Same in case of a draft page that I decide to publish definitively. PagExp add the expiration date.
Yesterday after a log out and a log in on the the site where I’m currently work this phenomenon didn’t happened again.
I can’t reproduce this “error” again and for this moment I didn’t try to a new site.