Editing Orders

I'm using Gravity Forms for managing a summer camp registration system. Awesome. Form location: http://www.parkcitysailing.org/v1/junior-sailing/jr-sailing-registration/

I provide the option for users to pay via check in addition to PayPal - the option to send payment to PayPal is conditional based upon the user's selection of a credit card/check radio button.

Only issue I'm having right now is the inability to edit the orders. For example, a mother signed up their daughter for several weeks of classes, mistakenly they signed up for and submitted their form and included an incorrect camp week in their order.

Now, I can't edit the form entry to adjust their registration - kind of a bummer, as now I'll have to have a bunch of manual fixes to manage my class rosters …

Any ideas? Recommendations? I'm sensing a shopping cart ...

Thanks - unfortunately, the message once I'm in edit mode is:

"Product fields are not editable"

Another use-case on why it may make sense to make these fields editable is that a user creates an order, goes to paypal, but see's it's wrong. They're then stuck - they either abandon or have to refill out the entire form.

So, I'm a proponent of:
1) Letting the admin edit the product fields
2) letting the admin generate the email to the user that contains a pay here link to PayPal

As a request, this is a bummer for our use of the forms as well. What happens for us is people fill out the form online despite the million warnings they will need to pay with paypal...and they bail at the paypal screen. They send a check instead, but often they also change what they order. It would save us a ton of time to not have to re-enter the person's info, but we're stuck.