I've been monitoring and logging my system since you've brought this up. I have an Eagle-200 so I can baseline the utility's numbers vs Tesla's.
Tesla's Grid usage numbers on my setup, the total (FromGrid - ToGrid) has been consistently ~700 watt below the actual utility number over the last 7 days.
I can't speak for Solar-usage because Telsa heavily rounds the number, but it's the same kWh vs the cumulative sum off my micro-inverters. For Home-usage, I have no way other way to monitor, and I'd assume Battery-usage is accurate.
So, if this inconsistency is consistent, your grid numbers are 0.2 - 0.3 + 0.7 = 0.6 kWh from-grid usage.