Back in Dec I sent a small amount (.02 BTC) to two different addresses, a few bucks to a friend and a few to my android wallet.  These were sent from my Bitcoin-QT wallets.

I was looking at these today, picking apart the wallet.dat file and noticed that when those transactions occurred, the blockchain had recorded transactions like the following:

MyAddress  -> FriendsAddress (.02 BTC)
                -> AnReservedAddressInMyBTCWallet (.8283 BTC)

and

MyAddress  -> MyAndroidWallet (.02 BTC)
                -> AnotherReservedAddressInMyBTCWallet (2.43 BTC)


What is up with this?