Dashboard Shows Incorrect Number Of Monitored Devices

I have 13 door/window contacts, 2 smoke/CO detectors, 2 glass breaks, 2 keypads, and and 1 extender. However, when my system is armed, the dashboard shows 'Monitored Sensors' as 16. I've checked all of the devices & they are operating properly and they all show up in the devices list. When I look at the 'Mode Settings' for all 13 door/window sensors and the 2 glass breaks they all show 'Armed and Monitored' in both the 'away' and 'home' modes. What is considered a 'sensor'? If only the door/window contacts are considered 'sensors' the dashboard is reporting 3 too many 'Monitored Sensors'. If the glass breaks and smoke detectors are also considered 'sensors', the dashboard is reporting 1 too few 'Monitored Sensors'. Either way, the dashboard is reporting the incorrect number.What am I missing?