When using the Email Experience Manager (EXM) Email Campaigns the default sorting for each List page (Drafts, In Progress, Automated, Scheduled, and Sent Campaigns) in some columns might not have the predefined order, and sorting by clicking on the button might not work as well.
To resolve the issue, consider one of the following options:
Be aware that the hotfix was built for a specific Sitecore XP version, and must not be installed on other Sitecore XP versions or in combination with other hotfixes. In case any other hotfixes have already been installed on a certain Sitecore XP instance, send a request for a compatibility check to Sitecore Support.
Note that the ZIP file contents must be extracted to locate installation instructions and related files inside. The hotfixes must be installed on a CM instance and then synced with other instances using standard development practices.