You're absolutely, 100% incorrect. The ECW Championship was a recognized World Championship from June 2006 to February 2010 when it was retired.
You're the one who is wrong here. Then again, you think Nikki Bella is a deserving Divas Champion. Since you clearly don't know what makes a diva a deserving Divas Champion, I wouldn't expect you to know what makes a title belt a World Championship either.
I don't deny that at one point it was a World Championship. The point is, during most of its time in WWE's version of ECW it was NOT a World Championship. In the real ECW and at first in WWE's version it was. Undertaker had the option to challenge Bobby Lashley for the ECW Championship at Wrestlemania 23 using his Royal Rumble win. Not even a few months later, Punk was feuding with Morrison in a developmental show. Everyone after Morrison held a glorified midcard title.
That's not a matter of opinion, it's a FACT. PWI recognized it as a World Championship. It's "kayfabe" standing in WWE is totally irrelevant.
Really? That's your argument? PWI matters yet WWE, the company who OWNS the belt, does not!?
You do realize that PWI doesn't recognize the TNA World Heavyweight Championship as a World Championship.... right? Last time I checked, being the top wrestler of a federation held a whole lot more prestige than being the top wrestler of a show that's half jobbers and half developmental. It's WWE's belt. If they stopped treating it as a World Championship (which they did long before Chavo won it) then it was no longer a World Championship.
The ORIGINAL ECW Championship wasn't even recognized as a legitimate World Championship for most of it's existence, because it wasn't defended overseas often enough to meet the criteria. If I remember correctly, it was only recognized as a World Championship for two years and was then downgraded to a regional heavyweight championship. Chavo Guerrero was a World Champion. Again, not opinion. FACT.
If you want to go by what a magazine says, go for it. I'd rather go by what the company who actually owns the product says. If a food magazine stated that Pizza Hut's Hand Tossed Pizza was a Stuffed Crust Pizza, that doesn't mean it actually IS what the magazine said. It's still a Hand Tossed Pizza because Pizza Hut said it is. That's how ridiculous your PWI argument is. Chavo was NOT a World Champion during La Familia and unless WWE officially state that he was, that's the end of the argument. You're wrong.
As for Chavo competing in the Royal Rumble, that was even explained by the commentators. He had already been announced as a competitor in the Royal Rumble match prior to winning the ECW Championship.
So if Seth Rollins got announced today as an entrant in the 2016 Royal Rumble then by that logic he would still enter it if he was still World Heavyweight Champion by then. He's not going to defend the belt against himself. That's stupid. Chavo didn't enter that Royal Rumble to defend against himself at Wrestlemania. If he got entered before winning the belt, he'd relinquish the spot as already HAVING a World Championship would matter more than the Wrestlemania opportunity. Nice try.
Anyway, the point is.... Chavo did NOT bring a 2nd World Championship to La Familia.... thus, the group only had one World Champion in it. The one member that did matter within the group's booking, which was Edge. More successful groups like Evolution were booked to where EVERYONE mattered. What La Familia did have was a World Champion in Edge, a midcard champion (Chavo), a GM in Vickie, a guy who did nothing (Bam) and a set of Tag Team Champions in the Edgeheads. They did have multiple titles in their control so they had that going for them at least. The only way this group would have had two World Champions in it would have been for them to add Raw's World Champion during the group's existence. Had that happened we might be having a completely different discussion.