My router tracks data usage, and shows that I used 1280.5GB, but my Comcast bill shows that I used over 1500GB and I'm being charged $80 for going over. Does anyone know how I've used more than 300gb that are not tracked by the only access point into my house. Both of these things don't seem compatible with each other. This isn't the first time I've noticed this either. I would really like to understand how they are counting more data than my router is delivering to my devices by over 20%.