Thanks for reply. As, mentioned, I cannot give you administrator access to the website. But I have set up a demo installation with your quick start-package for the JA Magz II template, where you can login, and now I have found the same problem with that installation, which reinforces the suspicion that the problem lies in improper coding of the template.
This is what I did with your standard quick start package for JA Magz II and the menu item Home:
Disabled modules: Videos, Banner Inline 2, World, Banner Inline 3, Business and World adv.
Selected away all categories except: Business and subcategories: Events, Services, Economy, Taxes and Training.
Set date for sorting to: creation date
Set item order to: Newest first (but demo installation shows elders first, I don't know why).
And then for articles, set all articles in the category Business and subcategories of Business to featured articles
Now it should be expected that the front page shows these articles (id numbers):
9, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 103, 104, 105, 106, 107, 108, 109, 110, 146, 201, 202, 203, 204, 205, 206, 208, 209, 210, 211, 212, 213, 214, 215, 216, 217
But the articles I have highlighted in bold are missing, and we see a pattern with four and four articles missing. The first four articles to be displayed after Load More are missing. Six new articles appear, and when you press Load More again, four new articles are missing, while six new articles appear, and so on.
This is the same pattern that we have seen on our active website, and if we change the number of Leading articles to anything other than 4, the pattern will also change for which articles are incorrectly excluded from view.