First of all you must submit PCC for all applicant while applying, I dont know why you didnt submit. It is mentioned in the checklist.
It is not mandatory to submit PCC with application. You can submit it later when requested.
The address is not same for all applicant.
It is same for all applicants. Only CPC-Ottawa processes Canadian experience class applications
You must send it to your selected processing center not to CPP-Ottawa only.
What do you mean by selected processing center ? CPC-Ottawa is the only one that processes Canadian experience class applications
So, check your processing center and send it to them, otherwise you have to go for new one.
Before sending, make sure that your file is with them not at Sydney office. You have to work accordingly.
It happened to me, I sent my NOA-2013 at Sydney, they said we dont have your file with us, so send it to your processing center.
CIO is not CPC. CIO-Sydney just check whether application is complete or not. If found complete they charge applicant and then forward that application to CPC-Ottawa. Once application is transferred they don't have any data on that particular application. So that's the reason they have to send all requested documents to CPC-Ottawa after file transfer.
Please make sure the information you provide is correct. 
