I got similar issue, I sent on Sept 11, they received on Sept 12... But I am receiving the passports and the COPR until today (oct 07)...
I called the CIC like three times because nothing was moving and I was worried about it.. on the last call they told me that they registered the passport on their system as received on Sept 23, and the processing times start counting from that date and not from Sept 12...
The agent was very friendly and told me that there was a batch of passports affected with that delay.
I would recommend you to call the CIC, and they will give you the real update about your passport.. Remember to have you case number and the tracking number for the documents when you sent it (the agent asked me about it on my last call to confirm the reception of the documents)..