Before your Campaign is Published:
Sign in to your WeDidIt account and select 1) 'Campaigns' then 2) 'Insights' on the left panel. From here you can click the 3) 'Pending' tab and click the 4) edit icon to edit the campaign goal.
Change the campaign goal which is on the 'Basic' part of the wizard. Click the 'Save & Next' button and finish the campaign.