Yeah, I haven't submitted "regular" but there's a disclaimer you have to click through when asking for CCS for sig series books. Basically, it says damage could occur, yada yada yada. I've had no issues on books returned so far, but I have a couple coming back from the Conway signing that graders' notes mention detached staples. I feel like I would have noticed a detached staple during inspection and packing, but I can't be 100% sure b/c it predated me photographing each book in great detail. Thankfully, I have good documentary photos for everything else pending service. My understanding is CGC won't let anyone else handle signed books, so maybe the more experienced people work there b/c of the added ink?
Really sucks about that book though. Hopefully, it still looks better than you fear.