When registering for an event using Event Registration 2.0 where an Additional Donation amount is entered, users can not return from step 3 to update the additional donation amount. Edits or changes to the Additional Donation amount do not carry through to step 3 of the form.
This is resolved in the latest version of NetCommunity
If you are not on the latest version, and the Additional Donation amount needs to be changed/edited, the user will need to close out of the form, and then access the site again. The correct amount can then be entered during the registration process.
Steps to Duplicate
Create an Event Registration Form 2.0 with additional donations enabled
Register for the event by selecting one ticket, and entering in an additional donation amount of $1,000
Complete fields in Step 2, and click Continue
Once on step 3, note the total amount that you will be charged
Click to return to step 1, and change the additional donation amount to $3,000
Click Continue, and progress back to Step 3
Note in Step 3, you do not see the updated total amount which reflects the $3,000 donation. Instead, the total reflects the $1,000 donation.