Did your video layers become linked or grouped together? Right click an see if you can unlink or ungroup.
No they are separate orginal tracks.
Is there a way to "select" a layer below the top layer via the Progam Monitor -- and perform modifications on that lower level -- such a manually resizing on the Program Monitor. I find if I want to do it via the Program Monitor I have to temporarily lock the top layer.
And if I have lots of layers above the layer I want to manually resize, I have to lock all of the layers above that layer so I don't start moving around (for example a title layer which might be the top layer of the sequence) in order to manually resize via the Program Monitor.
I know (for example) in the case of scaling or repositioning a layer I could do it via the effects control panel, but I often want to do it via the Program Monitor.
Sorry but the only way that I know about is from the timeline