Active Calls?

After logging in to my Free PBX server I noticed that active calls was on 5 and then a few hours ago I had 60!?

All the phones are in my office and NOT ringing so I’m somewhat confused as to whats going on. I also logged on to my Twilio service and can confirm that I’m not spending any money or registering any calls on that which the Free PBX is using?

Any thoughts on what might be going on?