How to catch all data packets sent by several beacons with nrf51822 concurrently?

Question

I wanna use a nrf51822 dongle to sniff all data packets sent by 4 to 6 beacons, without large loss. The code I use is a python api given here learn.adafruit.com/.../python-api 
 Based on current test, the number of packets I catch doesn't increase in linear with the increase of number of beacon devices. For one beacon device, I get 80 packets per second, while for two beacon devices, I get 100 packets per second, and 130 packets per second for 3 beacons. Obviously some packets are lost. 
 Can someone help me ?

Petter Myhre · Accepted Answer

It seems you have an advertising interval of 7.5ms. If you add the mean of the random delay( see this ) you end up with 12.5ms => 80 packets per second. 
 The scanner is only able to receive one advertising packet at the time, and is only able to scan on one advertising channel/frequency at the time. In addition, when you add beacons they will interfere each other.