Genuine copies of English version of manga?

I found out about the manga from the Netflix series trailer and decided that I wanted to read it before I watched it. I've never owned a copy of any manga I've read before, so I thought this was a good one to start since the covers are so pretty.

I bought em online and just received them (up to volume 4). I noticed that there were some issues that I would consider telltale signs of a fake product, based on my experiences with other types of branded goods or "genuine" products.

I know from a bit of googling that Yen Press is the official English language publisher (correct me if I'm wrong), but still is this what the books are supposed to look like?

The height of each book is different, there's typos in the synopsis, and the font on the spines and back seem to be a default Arial.

If anyone can shed some light on this I would appreciate it very much!