I have a city that should be producing 8 Mats; but it is capped at 5.
On the 'City Details' screen, it displays 5 Materials. When I roll over 'Materials', the pop up says I should have 8. The plot of land has 5 Essence, 3 natural, 1 scrying pool, 1 oracle upgrade.
The natural yield is 2 on the land, 1 clay quarry, and I should produce additional 5 with the Alchemy Lab.
I earn 13 prod units/material and my Production is at 65.