Hi Karl,
This isn't directly related to the latest version of the plugin. I use the group count for myself and my wife to show that we're either home or away. I realised that I wasn't getting notifications when we were both away. I updated the plugin just to see if the problem was still there and it is. I can't say when this exactly happened - at the moment we're both home and showing "Up" however the Group 3 (which we're both in) is showing 1 Home and 1 Away.
Any suggestions as to what's going on?