'Load More' duplicating posts on Activity (BP Social Theme)

Hello,

I have installed BP Social and received quite a bit of users today. There is a bug on the Activity wall which seems to be due to the theme:

When the activity wall has enough posts, it shows a Load More button at the bottom. Each time it is clicked, it replicates the same posts over and over, rather than showing older ones.

http://socadl.tremble.com.au/admin/wall

Please advise.