Try tonight's nightly build. There were some issues with the other selectors. Naturally, there will never be more articles shown than actually exist based on the selection criteria.
Anyway it is currently working for me.
[edit] sorry, I was using the DEV branch. There the articles per page is a selector on the tab. Don't know about the plugin option, but I do know that we won't fix it since it will be obsolete on the next release.