All this fiddling and experimenting with grouping (and visiting extended edit mode which i hadn't really looked at until Grazie reminded me of that new feature) has befuddled me.
I am getting behaiviour (in VP12) which I'm sure I didn't used to, but it might just be Altzheimer's setting in.
New Project. 2 video clips X and Y, drop them onto the timeline.
If I click and drag on X video then X audio moves with it (as I would expect)
Similarly if I click and drag on Y audio, then Y video moves with it.
If I click on X video and ctrl-click on Y video and drag either, then X and Y video and audio all move. So far, so good two video and two audio events selected.
Now, here's where I'm sure things have suddenly changed (I think)
If I now press "G" to group these events - ONLY the X and Y video events are grouped - ie the two audio events are no longer grouped to anything.
Similarly if start again and click on X video and Y audio then ony these two items are grouped - X audio and Y video are n longer grouped to anything.
Has it always been like this? I can't belive it because this has been fundamental to my editing since 2006!
I did wonder whether i'd maybe changed a preference somewhere whilst playing with extended edit, but I fired up VP11 and I'm seeing the same behaviour.