Why limited to only four cameras

I have the full deck

6 motion, 2 smoke alarms, 2 C02’s, two flood sensors, Skybell camera, three outdoor V723’ cameras, system works great got it operating as required however:

can’t change names of door sensors on Smartpanel have done in the Application 

can’t add another two V723 cameras it’s limit on panel is 4 is there a way of signal splitting or can I obtain another Smarthome panel to join the panels via software so I can monitor ?

plenty of Amazon systems come with 6-8 cameras being stuck with four is frustrating