More specifically, I think Rule no. 2 makes no sense. Especially in settings where there might be two completely different magic/supernatural systems that don't interact with each other. It also, in my opinion anyways, disregards the days, or even years, an author puts into defining their fictional world. This doesn't just apply to magic, but it can apply to other things as well. For instance: Both Star Wars and Stargate have Hyperspace. However, SG Hyperspace behaves very differently from SW Hyperspace. For instance, SW ships in Hyperspace not only continue to move (seemingly) but also retain their kinetic energy (Which is even enhanced sometimes, see the Last Jedi and the old Star Wars Marvel comics). There's also no evidence that say, Stargate Hyperspace travel would be hindered by large gravity wells like Star Wars Hyperspace is.
There's also a manner of associating magic/fictional systems that have *nothing* to do with each other and combining them into the same entity. For instance, Hamon from JoJo works completely differently from the Force or Ki from DBZ, and equating them into the same thing on the basis of all three of them being supernatural systems makes as much sense as equating cars and wheel barrels into the same thing because they're both vehicles with wheels.
Edit: However, if two systems seem to be similar enough (I.e. One setting happens to use a similar system because it spawned from that setting, i.e. Memetics, which first spawned in the SCP Wiki, is carried over to the RPC Wiki)., then I have no problem with them being equated into the same thing. The same is also true if the two have *explicitly* been shown to affect each other or if a character is affected by magic from various settings in a specific way (I.e. He-Man has its own magical system and it seems to still affect Superman).
There's also a manner of associating magic/fictional systems that have *nothing* to do with each other and combining them into the same entity. For instance, Hamon from JoJo works completely differently from the Force or Ki from DBZ, and equating them into the same thing on the basis of all three of them being supernatural systems makes as much sense as equating cars and wheel barrels into the same thing because they're both vehicles with wheels.
Edit: However, if two systems seem to be similar enough (I.e. One setting happens to use a similar system because it spawned from that setting, i.e. Memetics, which first spawned in the SCP Wiki, is carried over to the RPC Wiki)., then I have no problem with them being equated into the same thing. The same is also true if the two have *explicitly* been shown to affect each other or if a character is affected by magic from various settings in a specific way (I.e. He-Man has its own magical system and it seems to still affect Superman).