I have this one so that is all that's needed only one account showing only the PA?
If you input the application number and then the info (name, DOB and POB) for the sponsor, you will see info pop up for both the sponsor and the PA. If you input the application number and then the info for the PA, then only the info for the PA will popup. Application number is the same for both of you. UCI is different for both of you. So I would suggest you input application number each time. Just switch the sponsor and PA info at the bottom.
NOW, GCKEY is another account. ECAS will show u status ONLY. GCKEY is where CIC will communicate with you - send you messages with PDF letters attached. You will only get an email from the GCKEY notifying you that there is a message that requires your attention. This is where you will be asked to upload documents.
Make you are able to link to the GCKEY (unless you are using a lawyer, then that's up to him to create an account for you and send all required info on your behalf ... i think this is what the lawyers are suppose to do .. lol .. )
Let me know if you have any more questions ..
have you received any communication so far from CIC yet?