Calendar wont update existing meeting or show status of attendes.

I question that i hope someone can help me with.

Problem 1

If i have an existing meeting booked, if the owner updates the meeting, i will get an e-mail saying there is an change, but the existing booking won´t nbe updated, instead a new  meeting is scheduled next to the existing one.  

How can i change this? So that outlook will update the one already in calendar?

Problem 2

I cannot see status of attendes? All are grey except me,