>I think the actual converting factor is 1028, not 1000. I could be wrong though.

Allowing that you mean 1024, I believe that's covered.

The "K" implies 1024. Though possibly it should be 2048Kbps. Somehow doesn't seem right to me though.
Not sure if the broadband marketing works like hard disk marketing.
Hard disks advertise 160gig, which for mine turns out to be 159,989,886,776 bytes (formatted). I expected it to be 160 x 1024 x 1024 x 1024.