If you are profile manager you should have received an email saying a merge has been proposed. You might like to check your spam folder.
As to changes, or additions as long as they give sources and reasons for the changes that is fine. It is nice if any major changes are discussed with you first. You can always check the changes tab to see what was done
One thing to remember is this is ONE world wide tree, and potentially hundreds (if not more) of people are connected to the profiles you manage.