When you set the filters to All / All, the page count says 1 of 5, but in fact when you get to page 4 and click on the next arrow, it takes you back to page 1. All 36 of the figures are present on the 4 pages - 9 per page.
Nice catch. I'll add that to our bug list. It looks like the bug is when the number of figures displayed is an exact multiple of 9.
