Previously, when a user added a new audience to a campaign that targeted multiple audiences, they were unable to proceed past the Upload creatives page in the campaign builder. On this page, the Next button was disabled until the user changed one of their ads. When the user reached the Review campaign page, their creatives also appeared for each audience set they included in their campaign. Now, when a user edits a campaign, they can proceed past the Upload creatives page and will only see one set of creatives for their campaign. (ECOM-4042)