i've been gettin confused on brake set-ups too, i recently made a folder on my desktop, and as soon as i ship or recieve something i enter the name, addy and date in there, as well as payments recieved,
i've also had to go back into paypal and see who paid what and when, sometimes finding no addy attached to the pp acct,
but i am old as dirt and almost senile, whats your excuse???? hahahaaaaa