Wow, this is unbelievable !!! But I gotta say, I ALWAYS buy CGC only. Once, off of a guy in my city here from Kijjiji, I bought a Batman #7 CBCS 3.0 (several months ago) and I just sent it to CGC as part of the 50% discount to redo the "other companies" holders. I'm still waiting to see if it is a true 3.0 blue (hopefully higher ), should get it back in a week or two.
Another little story, but hockey card related, I sent a Howie Morenz 1933 OPC to KSA here in Ontario (Canada) ... not one of the top 2 or 3 companies for sports grading, but they are close to me and relatively cheap and easy to deal with. I spent about 1K on the card raw from a very respectable vintage card company at a local card show, but KSA came back with "authentic, trimmed" and no grade on a sports card that's been trimmed. I was extremely disappointed. Then , just last Fall PSA (the top compnay, equivalent to CGC in comics) was at a local show taking submissions. Long story short, I got it back a couple months ago and its a 4.0 and no trimming, nothing else noted - and I'm happy again.
Use the industry standard, it's hard to go wrong. I'd really like to know how this mess of an AF15 story ends though ................