Okay, so get this. I just read Pep 22-26, as well as Jackpot 4 and 5. Anyone who's read Pep 26 knows without a doubt that it's the 1st appearance of Veronica. But guess what? It has a cover date of April. Now, Veronica appears in Jackpot 5...which has a release date of March(Spring). So why is it that CGC and Overstreet recognize it here that despite having the later indicia date, Pep 26 is indeed the 1st appearance. Well obviously the answer is because it's undeniable that its her 1st app! So this should serve as admission that they recognize that Peps were coming out 2 months ahead! Clearly Pep 26 was on sale in February, then Jackpot 5 came out in March when Veronica was already established. Now why on earth don't they recognize this with Pep 23! This really grinds my gears...
Also, as someone else mentioned, if you read the stories, it's pretty obvious that Pep 23 is the 2nd appearance based on the content, since it doesn't take place in high school or involve other high school characters. Once Pep 24 and Jackpot 4 came out, it was all high school related and the characters had obviously taken on a more focused direction.