In Natively Spanish, there’s a graded reader series that contains books translated in multiple languages (Italian, German, English and French), not just Spanish. Grading also needs to be separated between the different books, as levels vary (from A1 to B2). Moreover, some books appear twice, as they are under the author of “graded reader”.
whoops! Yeah, in my auto series creator I must not be filtering by language… so when it found a book with the same amazon id it grouped them together. Will fix!