Lock the tracks?
Group your media together
Unlink your media
Gap = Right click, close gap
PD8 Main Track was closed to PiP track movement, PD9 isn't.
Move a clip and a gap forms = good
Title duplication and expansion - yes, you need to plan more and not assume - we now have multiple tracks and your new editing skill comes into play.
A title can be placed in any video track - no longer in one dominant title track.
PD9 is a new beast and it does still have issues to fix. Some of us who have used 9 for the last few months know PD9 is offering us some super capabilities.
Take it steady Roger and work your way through the functions. By all means stick in a Howto question for members. Don't load a lot of questions in one thread...
You have to plan more and think about adding more tracks for specific tasks. It is really good "fun".
Dafydd