I'm using PE v15 on an iMac.
I'm a newbie si I'm still figuring things out. I have been using the Default Title to add titles to my video. It seems when I update the text in one title it changes it in another. I haven't used the duplicate feature. I insert a new title whenever I need one. Am I not 'saving' properly after entering my text in the title box?
This is because you are copying your titles. When you copy a title, you create a clone -- and changes in one change the other.
As I show you in my books, the correct way to re-use a title's design is to duplicate your title by right-clicking on the title in the Project Assets and selecting the Duplicate option. This creates a new copy of your title that is independent of the original.
i sure don't remember copyng them but I guess I did.