Is this a mistake?

I seemed to have ordered a complete edition of the text and I get a teaching manual with extracts commented ???
I do not have the impresion that it is a mistake on my part. I clicked a good Pantagruel bilingual and it is true that behind this choice, there are several books that appear depending on the format. I noticed that the reference on my bill is 2011679672, while the one on the book is 2011679673: would you have the wrong book? It would be nice to have an answer Thanks in advance