Timestamps for log events are 10 minutes off

Question

I recently started using ETW with SLAB and noticed that time stamps for events are a bit off. Is there any reason that time stamps outputted from EventSource.WriteEvent would be 10 minutes earlier than when the event actually occurred? This is not a big deal, but I am curious why this might be happening.

Example Code:

[Event(100, Level = EventLevel.Informational)]
public void Info(string message)
{
       if (this.IsEnabled())
       {
           this.WriteEvent(100, message);
       }
}

The output might look like this:

EventId : 100, Level : Informational, Message : Method DocumentODSRepository.GetDocuments entered., Payload : [methodName : DocumentODSRepository.GetDocuments] , EventName : MethodEnteredInfo, Timestamp : 2014-06-25T20:38:18.8503447Z

However, the Timestamp should be 2014-06-25T20:48:18.8503447Z.