I have just gone through the same process ref visa attestation, and what was an initial problem seems to have vanished. Your PRO should have enough "wasta" to push through the application for renewal and also you are right, showing of the certificates without attestation works . I do not think the level of certificate matters, just the existence of a certificate which can be viewed.
I hope you are through this process as we speak, and wish you every success.
Dr.Colin