ebook pages to big and overlapping in ADE

Hello,

I just installed ADE on PC windows 10 and add 2 new ebooks (just purchased) in it. Trying to read them in ADE, the book pages they are too big to show complete page and pages overlapped each others. I transfert the book to my ereader Vivlio, ther the pages are complete but a bit small for confortable reading. On both the page counter tells 1/2 as it was only 2 pages but I can get to next pages ( more than 20 pages).

How can I fix this? See printscreen
kind regards Thierry