Collection Plone4 - incomprehensible behavior when rendering pages by page

Question

My plone collection folder does not display all items when using page by page browsing. I basically have 9 pages with elements, but pages 6-8 show exactly the same content. Therefore, not all elements are displayed, even if the total number of elements corresponds to the elements that should be in the collection. Here is a link to the page.

Setting the collection to display all the elements on one page or more elements on the page (100 instead of 20), visualization is correct and the elements starting with "20120921 ...". You can see it on the link .

This should not be a matter of collecting filters, as there are elements, but there may be a visualization error. Running the "Updates Directory" did not help. Using Plone 4109 and Zope 2.13.8

Has anyone noticed this behavior or what could be the reason? Thanks so much for any hint!

Answer 1

This is probably due to an error in Products.ZCatalog, which was corrected with the following change record: "Incorrect calculation of batches in the second half of the result set in sortResults has been fixed." I would recommend upgrading to the latest version of Zope 2.13 (2.13.23, to be exact).