My package (RB545236481CN) has been NULL for over a week. Is this normal?

Yes, it is generally normal.

As for your order, it has successfully reached you, right? Here is the latest infor I tracked:

2013/11/12 11:12, WINDSOR, Item successfully delivered 1496
2013/11/12 11:12, Signature image recorded for Online viewing 20, S KUTHIALA
2013/11/12 09:24, WINDSOR, Item out for delivery 0174
2013/11/12 08:54, WINDSOR, Item processed at local delivery facility Learn More The item has arrived at the destination facility for final sorting before delivery. Look for an "Out for Delivery" scan today or tomorrow to know when delivery will occur. You can also sign up for email notifications. 0170
2013/11/12 07:45, WINDSOR, Item processed at postal facility 0104

Sorry I am not at home, the online tracking still says it is at the airport but I called home and it did arrive so thank you