I completely agree with you. I have same Problem with me as I took my PCC from very next day my 18th Birthday and same of my wife's. SO now I myself is confused weather they accept it or not. but one thing which goes in my favor that it covers the last ten years from my 18th birthday to AOR/ITA.
My 18th birthday is 16 Feb 2006 and I took PCC from 17 Feb 2006. My ITA date is 04 October 2017 and OAR is 21 December 2017. Will taht be disturbing or will go in my favor?
You covered the last 10 years so it won't be a problem for you.