Thanks for replying to my query. However, this still doesn't solve the problem.
I exported each computers monthly stats and added them together on a spreadsheet so I could compare it to the online version.
I have a link to my tbbmeter stats online and my spreadsheet version (screengrabs). As you will see there is a difference...
For example: the first recorded day is the 17thJan - online shows 74.2 Total, tbbmeter shows 40.9MB.
The following two days are almost identical exept for a few MB discrepancy.
However on the 20thJan - online shows 132.5MB total, tbbmeter shows 460.5MB total. On that day my partner and i watched the iplayer(as mentioned in previous post) but it doesn't seem to show online. I understand from your reply that it only updates every now and then so there will be a discrepancy for a while but it should have updated by now? How often and when does it update online?
Sorry if this seem a bit long winded, but I just want to be sure so that I can take the fight up with BT!