This problem involves the Kindle edition of Ranma 1/2 (2-in-1 Edition), Vol. 11. The summary displayed on Goodreads for this volume 11 is actually the summary for volume 12. This same error is found on the actual Amazon listing, which might be the source of the issue. If you look at the Goodreads listing for the paperback edition, you'll find the correct summary that corresponds to this volume 11.
URL for incorrect listing: https://www.goodreads.com/book/show/5...
ISBN: 9781974727742 (ISBN10: 1974727742)
ASIN: B0992Z8H2R