Unless you're using multiple* UX's that provide similar functionality, each entry should not cause multiple announcements. It's another capability** that does it. I think you should start out with "clean" install without using any additional skin and see if multiple announcements occurred. If you don't get any announcement then start using a UX that provides it.

* Not a good idea and will cause unwanted issues
** Repeated announcements are provided when certain configuration is done in sys.txt