announcements and there updating

Hello when you create an announcement it shows in the groups timeline.

My question is this.

When editing an announcement does the system update my itself because as it is when i click timeline it shows the original announcement and when i click announcement under applications it shows the correct/updated version.

I just wondered will this update in its own time or to show the updated version in the timeline as well do i have to actually delete the whole thing and start again.?

I always end up having to edit what i do so I would prefer the system updates by itself rather than having to delete and start again.

am i missing something?

thanks