I was actually doing way worse than you were saying... lol
At some points of the game I was behind over 3x in metal value and 8x in army value.
The first time I was able to have more value was at 25min, 3min before they resigned.
They were ahead in metal reclaimed and I was the one excessing (com death).
Should have probably clicked to display team value instead of all 3 players individually, this resulted in you sometimes confusing the statistics.