Im sorry you are having this issue with your bandwidth. I did look over your account and see that the slingbox needs to be setup for internet viewing. This is what is most likey causing your issue with your bandwidth. This issue is usually the speeds on network but you have aready found them well above what you need. 2.0 mbps is all it takes in upload and download. If you use the site Portforward.com you can find a walkthrough for your router make and model. You also need to be with the slingbox on same network to access the router to setup the setting need. You will go to setup.slingbox.com on the computer at home location and click your slingbox from directory, and then select setup internet viewing from list. This will give you port and IP address need for steps in portforward.com.
Thanks for posting