Hi
Editing an existing reservation:
Yes, in OrdaSoft
Joomla cck we go to this.
Right now, in our Joomla cck -> Instance manager - you see buttons for rent edit, and there you may change rent dates.
But ,as me seem, some limit must exist - other will not clear what real user rent - if you may change any thing.
For now: you may use current rent request - as draft request from user. And at time end confirm with client - you may remove this draft rent request - and create new - with all info which you need. For that you may add to rent request fields - which will see only you as admin - where to you will add your comments
Regards
OrdaSoft team