I have found that when both the engagement program and the new email program were released, they are not automatically added to your tags as availble program types. You have to manually edit each tag and add these program types to the "Applied To" field. If you go to Admin > Tags, then Right Click > Edit, and click the down arrow on the drop down menu, you can add the remaining program types. You will then need to add those tags into each of the recently added program types.