The System line on the Spyder tab duplicates what you should see as your real-time usage on the Live dashboard tab. The live dashboard should show your usage as determined by the 200amp CTs connected to your mains, which should be plugged in to one of the MTUs. What are you seeing on the live dashboard for usage?
Assuming you see data on the live dashboard, but not on the spyder tab, my guess would be the spyder tab is pulling "live" data from the wrong MTU, which would be a software glitch in the ECC.