Headscratchers / Amalgam Universe

• I heard that Amalgam-related events were supposedly canon for both Marvel and DC (though for obvious reasons they could never mention them in their personal comics). And there is JLA/Avengers, which is also supposedly canon for both of them, but the two things aren't canon to each other. I understand the real reason is most likely that Kurt Busiek didn't want to deal with this stuff, but I wonder, if there exists an in-universe explanation?
  • The second mini-series follow-up, Unlimited Access might hold some clues here, as it implies that the heroes from both worlds tend to forget about the other world after some time (as such, Wonder Woman doesn't know who Access is, despite having met him in the previous mini-series, All-Access). In JLA/Avengers, the heroes find a way to cross the universes that don't involve the two Brothers, but as they don't remember their previous team-ups and amalgamation, it would have been like the first time for them.
• I have one doubt; if the "Brothers" are the personifications of the Marvel and DC universe in Amalgam Universe then what will they be classified? As Moe Anthropomorphism or Anthropomorphic Personification?
  • Anthropomorphic Personification. The moe one is a specific type of anthropomorphism where the brothers don't fit (they are too muscular to be considered Moes)
• Having read and re-read the Marvel vs DC mini series, I am still confused as to which brother is which... both brothers are seen with characters from both universes but I just want clarification. Red or blue, who is who?
  • I'm presuming Marvel is red and DC is blue going by the logos of their recent productions.
• Why were half the heroes doubled up in their amalgams? Wonder Woman was Freelance and Amazon, Batman was Dark Claw and Agent Bruce Wayne, Quicksilver was Nickel and Mercury, There Was Iron Lantern Hal Stark but there was also Tony Stark in Shield and a Hal Jordan in Speed Demon. Catwoman was Selina Luthor and Catsai, and it goes on. Why was it like this?