Certified Pre-Owned With Swapped Dial?

[RestfulJambs]

I recently purchased a 2009 Milgauss 116400GV with a Z-Blue dial from an AD through the Rolex certified pre-owned program. The watch came with the original warranty card and of course was pre-vetted by Rolex itself under the CPO program. The serial no. also confirms it’s 2009. HOWEVER, someone pointed out to me that the Z-Blue dial was introduced in 2014. Is it possible that a Rolex CPO watch could have a swapped dial? Maybe yes, if the dial was changed by an authorized Rolex service center? Does this affect the value of the watch? Resale price is of no importance to me. It’s not an investment piece and I bought the watch to wear and keep forever. But I’m obviously wondering if I should alert the AD and return it if they don’t reduce the price (that is, only if the value is affected). I love this watch dearly, but I’m not one for being suckered.