In which section??
Sometimes it can get confusing which section you are viewing.
The Model T section has few posts then the Model A section for example.
Not to confuse the situation but if you want to see more threads per page then what is set up as default you can go to your control Panel (user CP) at the top of the page, click on that. Now look to the left and click on Edit Options, then click on thread display options. You have a few choices to select from.
Hope this helps