i just found out the reason for the (2) in the device field for certain books. those are the ones i transferred from amazon via wifi to the oasis and they are in the new ?kfx? format which calibre won't recognize. thus, it can't 'link' or 'combine' them as you describe, is my guess.
you can tell by going through the /remove from device/ dialogue and it'll show you what formats it sees for the duplicate title.
now, if somehow i could get the kindle to just show me these titles in that format i could ensure i'm reading the copy which doesn't have any of the features stripped out. maybe i could put some sort of 'tag' on those titles in the kindle storage, but i seriously doubt that would work as i think the kindle reads the title at a deeper level than what is displayed to the operating system on the kindle storage.
/guy
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