Pagination – browsing pages and browser back button returns to page 1

Hi team,
I like your tool because I can choose the categories to show in a grid.
I am using Grid 1 with pagination on set to show 10 per page.
My issue is when a user is browsing the pages and you move from page 1 to 2, then onward and say you are on page 4 and want to return to page 3, it is often that to user will hit the browser back page button. When that is done, your tool returns them to page 1 in all cases versus the actual previous page.
I’ve noticed in the URL, that, unlike other post display tools, you are not capturing what page they are on.
I want to be able to select the categories to display and want what I have come to experience as a normal page navigation where if I hit the browser back page that it works properly, not sending me/or users back to page 1.
I hope you can fix this, else I’ll need to seek an alternative.

The page I need help with: [log in to see the link]