i add some tracks to my current playslit, i quit MP. When i restart MP and go to MyMusic i don't see what i had added last time.
How can i resume the last current playlist after restarting MP?
That’s how it has always worked; the playlist is a temporary list that gets flushed when you close MediaPortal. If you want to keep your playlist you will have to save it before exiting MediaPortal. What I do is create a playlist (I called it 'Temp'), and then overwrite it every time I make changes...but it is a bit of a effort to keep it maintained.
As for MP not remembering your current playlist when you close it? I believe it should remember it, but MP is in a feature freeze so I doubt that it will be changed...even if we ask for it