Mediacom

I checked my data usage today and it says I have used 0 with 20 days left.  I obviously know I have used some.  Is there an issue with the data usage meter on the app? 

I have not been receiving all of my messages to my .mchsi email address.  I know this because I have had people and various businesses tell me they have sent me messages and I never receieved them.  Just today I had a couple of itineraries sent from ...