As far as scenes and show file storage, this is my understanding of the dLive operation:
Scenes are loaded to/recalled from/used within the mix racks.
Show files are stored in the surface…. when saved from the surface control.
Show files are stored in the PC/MAC….. when saved with the PC/director software.
When using a PC/MAC with director you can’t access/see saved show files located on the surface so you cannot recall them.
When a show file is recalled from a surface, the scenes are loaded to the mix racks and then become available and accessible to the PC/MAC with director connection and can be recalled/edited/etc…
You could recall your show from the surface, then save it on your PC/MAC with director as a backup copy. Another backup option would be to use a usb thumb drive as backup storage.
Personally I wouldn’t try and recall scenes from multiple locations during the same show, as mentioned above, the scenes are shared by all control connections. If you are worried about what is saved/recalled, set your recall filtering accordingly to try and avoid those issues.