There is one possibility that springs to mind - a mix-up in logfiles. Are you sure you are analyzing the right logfile?
If you are sure, then this probably requires some "under the hood" maintenance. Can you please send me your DB? If you are using MSAccess, just zip it up (with mission files and logfile) and email it to me. I'll fix things and send back. If you are using MySQL, send me the remote connection details and a zip of the mission and log files.