Hi again @reenie_arnold ,
I'm sorry you're still frustrated with the announcements issue. It would really help if you could show a screenshot from student view. I really believe that if your students are seeing all 3 dates, that there must be some code conflict happening at your institution.
Students only see the Posted date and last edited date if there were edits after the initial posting/when it was available for general viewing.
I agree scheduling an announcement is definitely the way to go, I rarely send any announcements right off the bat. Even when I'm going to announce on the same day, I schedule it for the top of the next hour or 3 hrs later in case I wanna come back and make changes. Any changes made to the announcement BEFORE it is officially posted, DO NOT show up in student view. Students DO NOT SEE the Created date.
I just checked it out again, looking at an announcement I posted on Sept 17. I'm west coast and posting it for east coast students.
Teacher view of edited announcement
Teacher view shows all 3 dates: created, posted, edited.
Student view of an edited announcement
Student view only shows the posted date.
Again, if you can share your screenshots it will help very much to understand what's going on in your Canvas instance.
Hope we can help solve this issue for you,
Cheers - Shar ⭐