I found something. It may be obvious to others, but it is interesting to me
Some weeks ago, I called CIC to ask about my temporary number, and they gave me a number that began with the letter X (like XEP*******). Today, I received my AOR and it is as same as the temporary number without X (EP********). Everything is the same, and they just cancel the X.
Also, when I go to the On-Line Services Website and enter my Application number, it cannot identify the information I provided, and it is weird to me :/