I think I know why the list seems so bizarre.
I presume it originally came from this book. I'm an editor and used to work for the company that made the book. Its main area of publishing is 'co-editions' - basically, you think of a book idea then sell it to lots of other publishing companies around the world before you actually make the book, and these other companies will sell it under their own name. It's a good, very low-risk way of making money in publishing because all your costs are underwritten before you even start.
The drawback is that, because you want the book to sell all over the world, you have to make it appeal to the whole world. The biggest market is the USA, so these books really have to be skewed to an American audience. It will then be sold in translation all over Europe, so you have to have lots of European content too. The risk is that in trying to be so all-inclusive, you lose the book's integrity
and it starts to look strange to the UK audience.
I think that's what's happened with this book. The list is very US-centric but also carefully includes lots of obscure-sounding European authors. In trying to be all things to all people, they've ended up with a a list that looks a bit odd to us Brits.
Having said that, there are lots of things on here that I've not heard of and I quite fancy trying!
(my score was 204, by the way - I'm quietly impressed with myself!)