[truth1ness]

I'm a bit confused about the "When syncing this list:" dropdown options. I simply want to:

1) Add books from the list that aren't yet on my device
2) Leave books on the list that are on the device alone on the device
3) Remove any books on the device that are no longer on the reading list

But for some reason every I sync it does a massive sync replacing every single book (whether I select Add All or Replace All, and only Replace all deletes removed books). There may be zero changes but it still takes like 5 minutes deleting and re-writing every single file (then Dropbox has to re-process all the files on top of that). Am I doing something wrong? This seems a bit inefficient, especially since the plugin already knows what files are there if it can add only new files so it should be able to leave existing files in both lists alone, no? Is there a better way to do what I'm trying to do?