error on modifting recurring events

I’m testing this fantastic component on joomla 2.5 and it is perfect for my needs.
Unfortunately I discovered that trying to modify a recurring event ends up in a mess (If I try to change something in the “No end date, After occurrences or End by” section, the event either don’t save, or disappears or will suddenly becomes an “all day event”, moving on the top area of the scheduler).
You can see my test scheduler here,mode=event_location I’ll leave it open to test

Thanks for any help