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That is the premise of the article. It is bizarre in relation to our models of the universe. We don't know if it is unusual in relation to the universe itself. As the article states:

>Clearly, the theoretical models are wrong, or at least (and more likely) incomplete. Obviously, there’s more to learn about galaxies that exist at the edge of the observable Universe.

I am reminded of that tale about how "Eureka!" is not exclamation of good science but instead "That's odd.". This article is saying "That's odd." in a way that signals we are on the verge of new scientific discovery.

We can more readily validate gravitational lensing than any early universe physics. So my guess would be that modeling the lensing is the easy part to validate :)

> I'd love to have that level confidence in software

Well, I mean, if you spend years mathematically validating your programs...