modifying wordpress theme

My website uses the Lobo theme ([login to view URL]). The main page is a long scrollable dynamically loaded list of portfolio items. Lets say for example that there are 100 projects in the portfolio. When I first load the page I see the first 12 projects. If I scroll down a bit, the next 12 are dynamically added to the list and so on until the page shows all of the 100 projects. If I scroll down 3 times (for ex) on the main page and then click on a project (for ex the 36th), I see as expected the selected project. If I click on the 'back' button, the frontage reloads showing the top of the portfolio list, which means I have to again scroll down 3 times and wait for the projects to reload before I can click on the 37th project to view it. I would like it so that when I press 'back', I arrive at the place in the scroll where I was previously (i.e.: in this example, at the equivalent spot attainable with 3 times the scroll down) PLEASE look at included video; you will see that after clicking on the 'Tiger' image, the sub-project is displayed, but when the back button is pressed, the Tiger is not visible anymore : user has to re-scroll to find where the was at. I do not believe the problem is much more than a few lines of codes (mayb simply a session variable which would hold the current scroll position ?) For your development needs, I will make available a cloud test server. Upon successful completion of the work, I will need to receive a list files with the changes )(a 'diff' output basically) that was made to them so I can transfer the modifications to the current production server. Thank You for bidding :)