1. Perhaps Perez, for whatever reason, was only aware of the Fury 161 data, just as Call was. He knew what he needed to know and didn't care to do any more homework because that's how he operated. I've known plenty of people who literally only sought out the absolute bare minimum amount of information possible to accomplish their goal. Sometimes it was out of laziness, sometimes it was "plausible deniability".
3. That isn't entirely accurate. Not all of the comics and whatnot reference the invasion of earth. In fact, the majority of them are stand-alone enough that while they don't "contradict" the earth-invasion stuff, they're merely independent of it. Off the top of my head, the stuff that outright references the invasion:
- Aliens/Predator: Deadliest of the Species
- Aliens: Genocide
- Aliens: Hive (I think?)
- Aliens: More Than Human (the newest comic series)
- Aliens: Music of the Spears (maybe?)
- Aliens: Sacrifice
- Aliens: No Exit (I think)
QuoteThat's a fact, there can't be anyway to link all the Alien continuity to Alien Resurrection, it's on its own plane of existenece.
No, like I said, it's an opinion.
If you want to consider them separate, then more power to you. I'm certainly not going to stop you or tell you that you're "wrong". I suppose I'd appreciate the same courtesy, is all.