People Counter using BLIP

Hi,

I am working on BLIP People Counter using GUI. I followed every step as per user guide but I am not able to get the correct count. For 1 in and 1 out I am getting like 2 in and 3 out......I haven't connected any external wifi module now and I mounted it at a height of 6 feet using 5000940 lens which is given in Blip kit from analog devices.......How can I get accurate count of in and out  using people counter