Ok good. Basically there are 2 trackings going on when you do something like that:

1. General SR account tracking by IP address. Rules state you can only have 1 account per household (SR accounts can have many IP addresses but each IP address can only have 1 SR account) and duplicates are discussed on a case by case basis to resolve

2. Greenfield tracks surveys by SR user id so make sure if you go to his house again you are using your correct info on your account (doesn't seem to be an issue for you).