Just testing my new Trezor to better understand it.  I sent myself 50 mBTC.  Then I sent 15 mBTC to another address in my Armory account.  On the blockchain, I can see that the 15 mBTC went to the right address, and it looks like the change went to a different address.  On my Trezor, the account shows the right amount (35 mBTC), but I can't find that change address anywhere.  Where is it?  How do I keep track of exactly which addresses have what amounts of BTC?  Or am I not supposed to?

Also, is there a tutorial anywhere on how to interpret the BIP32 Path: m/44'/0'/0'/0/1 data?

Thanks