I apologize for any confusion this amount of contacts may have caused! With that said it's important to note we suggest not counting the number of contacts in your lists to gauge your active contact levels. There can be cases where a single contact is added on more than list. Your correct level of active contacts can be located under the Active link of your Contacts Tab.
However I have taken a look at your account and was unable to replicate such a high number in your active list count. In fact, looking at the activity tab of your Contacts I can see you have recently deleted contacts. Were you able to locate this difference in numbers? If not I would suggest using our Segment Tool to locate any contacts who may not be included in a list.