The new "Post Announcement to Sections" feature has caused some confusion in our user base. If a course only has one section, there are currently two options in the drop down menu when creating an announcement:
One is called "All Sections", the other is the same name as the course. Selecting either one produces the same result. My suggestion is removing the drop down menu all together for courses that only have one section (the whole course). If there is only one section in the course, there should not be two options which produce the same result. This is poor user experience.