To make the navstrip display, try deleting this bit in the CSS: #lj_controlstrip { display: none !important; }
Also, I snagged the CSS and tested it in one of my character journals. From what I can tell, you can have any amount of entries you like appear on the page but the previous/next links will not appear until you've actually filled the first page. Once you meet or exceed that limit, they'll appear. The reason it's 'breaking' when you make the limit higher is just that you don't have that many entries.