I'm implementing presence with pubnub, and I'm encountering a problem, I create a method to get the presence in python, and its working properly, when I connect one to 20 users simultaniously, but once I created more, I didn't get the proper response of the joins users.. I created a simple js script to subscribe users..

```
var pubnub =[];
  for(i=0; i<=100;i++) {
     pubnub[i] = PUBNUB.init({
        subscribe_key: "subkey",
        uuid: "user"+i
     });
   }

```

After the first 20 I just get the occupancy in the response of the presence method, instead of the usual, join or leave action with the corresponding uuid.

Does it have a limitation, or perhaps, pubnub know that I'm opening them from the same ip and its blocking subscriptions somehow? I would like to know how it is the behaviour.