Event Sharing not working | Assassin's Creed IV

I am currently trying to complete all 100 of the Abstergo Challenges present in Assassin’s Creed IV, but 3 in particular require you to share the locations of 3 different events 3 times. The problem with this is that it’s not working for me. I’ve come across multiple events and in the pause menu, it has told me that I have shared these, when in reality I actually haven’t. Have anyone had this issue arise? Does anyone have know or have a fix for this. I really want to 100% this game.

Thanks in Advance! :thumbsup: