Quantities on Grouped Products

If I try to add more than a quantity of 1 to a quote on a grouped product, the resulting quote only shows that I added 1. For example, on the page I linked to, if I try adding a quantity of, say, 3, then look at my list, it only shows that I added 1. Does the plugin respect quantities on grouped products? This didn’t seem to be an issue on simple products.

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