The Tags view contains a list of all tags that you've created. To view the posts that contain a specific tag, select the Tags view and click on the required tag. Learn more.
The posts that contain a common hashtag can be listed by clicking on the hashtag. The posts that fall under this hashtag get listed in a new tab. Learn more.
Some messages might fall under more than one filter category. While being processed by multiple filters, certain filter actions might be repeated more than once. Some actions take place even when repeated. But actions such as 'Move to Folder', ...