Periodic meetings issue

Hi !
I have noticed something :
I created a periodic meeting for 3 times, with location and attendees. All 3 meetings was created OK.
We passed 2 meetings, and now I have to schedule 4 more meetings. I updated the initial periodic meeting, and all the 4 more meetings was generated. But on this new meetings, there is no attendees, location, and time.

Thanx by advance.
Cédric