I have got an interview invite yesterday and was interviewed today.
The interview was via skype and lasted for 45 minutes.
The interviewer was very nice and friendly. I was like making a mock interview with my friend.
please help1.After the interview I have sent the interviewer a "thank you letter", but, damn

I have misspelled the interviewer's name

at the very begining of e-mail.
Now I am worried whether to send back an excuse letter or just ignore this fact and wait for final decision.
2.Do the Adcoms release decisions just before the deadline or asap after the interview?
thank you
Tuck is my first choice school so I will pay the deposit next day after receiving the admission result!