Book length wrongly included in citation as pages cited


Some of the books I have in my EndNote library include the number of pages in the field of that name (these come mostrly from dowloading the citation from a database like Web of Science). When I cite the book in MS Word 2011 (EndNote X5, Mac OS 10.7.5), the reference includes the number of pages (book length) as the cited pages. Is there a way to avoid this behavior? (Other than deleting the book length for each book in my library).

Thank you in advance,

Jomar Bueyes