Open GPS Tracking System

Hi All, I am using OpenGTS from long time but now I found a problem in Arrive/Depart status code. Device send same latitude and longitude but the still server tag the status code as Arrive or Depart. I am also sure that the device sending data in sequence of time. The detail report is as below: 12-10-2012 11:30:13 Location 26.96532/75.79215 1.64 Km From Vidyadhar Nagar, IN 12-10-2012 11:31:10 Depart 26.96532/75.79215 Geozone 2 12-10-2012 11:31:12 Location 26.96532/75.79215 1.64 Km From Vidyadhar Nagar, IN 12-10-2012 11:32:10 Depart 26.96532/75.79215 Geozone 1 12-10-2012 11:32:12 Location 26.96532/75.79215 1.64 Km From Vidyadhar Nagar, IN 12-10-2012 11:33:10 Depart 26.96532/75.79215 Geozone 1 12-10-2012 11:33:12 Location 26.96532/75.79215 1.64 Km From Vidyadhar Nagar, IN 12-10-2012 11:34:10 Depart 26.96532/75.79215 Geozone 1 12-10-2012 11:34:12 Location 26.96532/75.79215 1.64 Km From Vidyadhar Nagar, IN 12-10-2012 11:35:10 Depart 26.96532/75.79215 Geozone 1 12-10-2012 11:35:12 Location 26.96532/75.79215 1.64 Km From Vidyadhar Nagar, IN 12-10-2012 11:36:10 Depart 26.96532/75.79215 Geozone 1 12-10-2012 11:36:12 Location 26.96532/75.79215 1.64 Km From Vidyadhar Nagar, IN 12-10-2012 11:37:10 Depart 26.96532/75.79215 Geozone 1 12-10-2012 11:37:12 Location 26.96532/75.79215 1.64 Km From Vidyadhar Nagar, IN 12-10-2012 11:38:10 Depart 26.96532/75.79215 Geozone 1 12-10-2012 11:38:12 Location 26.96532/75.79215 1.64 Km From Vidyadhar Nagar, IN 12-10-2012 11:39:10 Depart 26.96532/75.79215 Geozone 1 12-10-2012 11:39:12 Location 26.96532/75.79215 1.64 Km From Vidyadhar Nagar, IN 12-10-2012 11:40:09 Depart 26.96532/75.79215 Geozone 1 12-10-2012 11:40:11 Location 26.96532/75.79215 1.64 Km From Vidyadhar Nagar, IN 12-10-2012 11:41:09 Depart 26.96532/75.79215 Geozone 1 12-10-2012 11:41:11 Location 26.96532/75.79215 1.64 Km From Vidyadhar Nagar, IN 12-10-2012 11:43:09 Depart 26.96532/75.79215 Geozone 1 12-10-2012 11:43:11 Location 26.96532/75.79215 1.64 Km From Vidyadhar Nagar, IN 12-10-2012 11:44:09 Depart 26.96532/75.79215 Geozone 1 12-10-2012 12:10:06 Depart 26.96377/75.79102 Geozone 1 12-10-2012 12:10:07 Arrive 26.96377/75.79102 Geozone 2 12-10-2012 12:10:08 Location 26.96377/75.79102 Geozone 2 12-10-2012 12:11:06 Depart 26.96377/75.79102 Geozone 1 12-10-2012 12:11:07 Arrive 26.96377/75.79102 Geozone 2 12-10-2012 12:11:08 Location 26.96377/75.79102 Geozone 2 12-10-2012 12:12:06 Depart 26.96377/75.79102 Geozone 1 12-10-2012 12:12:07 Arrive 26.96377/75.79102 Geozone 2 12-10-2012 12:12:08 Location 26.96377/75.79102 Geozone 2 12-10-2012 12:13:06 Depart 26.96377/75.79102 Geozone 1 12-10-2012 12:13:07 Arrive 26.96377/75.79102 Geozone 2 12-10-2012 12:13:08 Location 26.96377/75.79102 Geozone 2 12-10-2012 12:14:06 Depart 26.96377/75.79102 Geozone 1 12-10-2012 12:14:07 Arrive 26.96377/75.79102 Geozone 2 12-10-2012 12:14:08 Location 26.96377/75.79102 Geozone 2 12-10-2012 12:15:06 Depart 26.96377/75.79102 Geozone 1 12-10-2012 12:15:07 Arrive 26.96377/75.79102 Geozone 2 12-10-2012 12:15:08 Location 26.96377/75.79102 Geozone 2 12-10-2012 12:16:06 Depart 26.96377/75.79102 Geozone 1 12-10-2012 12:16:07 Arrive 26.96377/75.79102 Geozone 2 12-10-2012 12:16:08 Location 26.96377/75.79102 Geozone 2 12-10-2012 12:17:07 Arrive 26.96377/75.79102 Geozone 2 12-10-2012 12:17:08 Location 26.96377/75.79102 Geozone 2 12-10-2012 12:18:07 Arrive 26.96377/75.79102 Geozone 2 12-10-2012 12:18:08 Location 26.96377/75.79102 Geozone 2 12-10-2012 12:19:07 Arrive 26.96377/75.79102 Geozone 2 12-10-2012 12:19:08 Location 26.96377/75.79102 Geozone 2 12-10-2012 12:20:06 Arrive 26.96377/75.79102 Geozone 2 12-10-2012 12:20:07 Location 26.96377/75.79102 Geozone 2 Kindly help me out this weird problem. Best Regards, Dino