I had been noticing we haven't been getting as much bandwidth, as I was expecting from our Cable Modem connection. Out of curiosity, I turned off the QoS setting that I talked about before, and our download speed went from 3000kbs to 6500kbs.
I tried adjusting the settings, but I wasn't able to get it working well. I don't really want to spend the time now to upgrade to a later version of the sveasoft software or try OpenWRT, so I am just going to leave QoS turned off. This isn't a big deal, since we don't run a server at home or use VoIP any more.