It does not look too bad. You only breach the limit on 2 occasions in almost 2 years, and one of these was just barely exceeding the 250GB max. Considering your normal usage, you might not have been bothered in that one off month unless the system was degraded.
Don't you have two separate modems going into one router in your setup? If so, wouldn't you have two Comcast accounts with a total of 500GB (250GB each) available if you did the same thing with Comcast?
