[chaley]

I did a similar experiment as jackie_w. I use a template to build collections so there can't be anything in the OPF. I had the same results.

The tests:

1. Test putting a book in a collection in one send:
   
   • Mark a book not on the device with a new item that isn't on any book
   • Send the book
   • Eject
   • The tag is there after the book imports.
2. Test Update cached metadata on device:
   • Reconnect
   • Change the unique item created above.
   • Push "Update cached metadata on device"
   • Item changed in the device book list
   • Eject
   • item changed on the device.
3. Test removing the new collection item:
   • Reconnect
   • Remove book from the device.
   • Eject
   • Book and item are gone.

This shows for me that a single send is all that is needed except for series.

I am using the base KoboTouch driver in case that matters.