Well if m not wrong so UCI is the number that belongs to the one who is sponsoring not to the one who is being spinsored and that number you don't get it through AOR ,
Though it is written in that piece of paper which we call AOR but that number is your account number which stayes with you through out your life ....
The purpose of AOR is ,as it is abbreviated "Acknowlegment of Receipt" is giving you a heads up that they have revived your file and your are eligible to sponsor and it gives you the new number which we call file number or application number that belongs to the person who is being sponsored... May b m wrong but UCI number I had it when I came into Canada about 10 years ago....
Well I guess it's useless discussion that what exactly it is.. The important thing is we are all getting sick coz of this never ending wait.. That's why spending too much time on these forum and have nothing else in life..
Just kidding and I appreciate your help on this forum..