[Staked]

Ok, my old lady has informed me I'm getting a Kindle for Christmas so I've been working on getting my ebook library set up for it. As there is a Kindle reading app for the PC and my Android phone I'd like to get all the books synced up between all apps. Note that I do NOT care about syncing what page I'm on for non-Amazon purchased ebooks. All I want to do is keep the mobi files themselves synced between everything.

As I don't yet have my Kindle Touch, I'm currently just trying to get things synced for Kindle PC and Kindle Android. Here's the setup:

I have Calibre's library set to Dropbox\Calibre. That works fine, but if I change Kindle PC's default directory to Dropbox\Calibre it doesn't appear to look in any of the subdirectories that Calibre has created there.

How can I either get Kindle PC (and Kindle Android as I'm going to sync Dropbox\Calibre to sdcard/kindle on my phone) to look in those subdirectories or, if that's not possible, how can I get Calibre to just dump every file in Dropbox\Calibre and not create subdirectories?