It appears you are using the IDX Broker widget instead of the Equity IDX Property Carousel widget which is styled for the theme. Our Must See demo with IDX Broker (using the Equity IDX Property Carousel widget) is located here for comparison:
I did realize that – although you caught me for a second and I thought I had a SMH moment. The reason we aren’t using that widget i.e. because the client HAS no listings. (See the site now)
IDX Broker custom showcase widgets require some tweaking with width and number of columns to fit properly. Usually just removing the border and drop-shadow from the widget css in IDX Broker is enough to make it look good in the theme.