It would be best if you were to start a new topic of your own so that support efforts can be focused on your specific problem.
In general data can only be used in two places. On the Hughes end or on the users end of the network.
The test described above is to determine if the Hughes modem is using data on its own.
If the modem is found to be "not guilty" then information will be given on how to dig deeper into what programs, processes or devices on a users network is using the data.