One has to submit the I-693 in a sealed envelope to USCIS. I don't think USCIS allows "Back to the Future" type technologies such as PDF or electronic signatures.
First wait to see subsequent updates and make sure that it is not a system glitch. Wait till you actually receive the Welcome letter and Card in hand. As a reference I got a false CPO status in 2012.
I have heard about cases where GC was approved when the PD is not FA current. If it is an extreme case (say your PD is way off for approval), I would advise you to report to USCIS and get it corrected. The process of returing GC is a messy thing as the system already updated you as LPR with CPO. To go back will be a mess.
As your FA date is current, I suspect that it might be a real CPO and not a system glitch. If you have an attorney, talk to them.
My advise would be to interfile the medical report for primary and derivatives (as you have them readily available).
See my post for sample interfile letter format. Keep it simple, no need to say you are a LPR, just send the interfile request letter the day you receive the card in hand. Keep the records, copy of the interfile letter and proof of delivery. The complete history will be in A# file and USCIS will look at it at time of Naturalization. You acting in good faith will help. Then enjoy your GC.