So I started discounting equipment based on:
"Equipment discounts apply to individual items, go up in multiples of 5% and cost 1,1,2,3,5,8,13,21,34,55 points per level"
However, it actually goes 1,2,3,5,8 and to get from 20% discount to 25% is 8 points not 5. Please correct this. It would be nice to get the 5-6 points back I wasted finding this out, but not a big deal. Also, you might want to check the equipment improvement selections as well and goods price discounts to make sure they are working properly.
When I posted this issue in strategus issues thread, some idiot moderator locked it within seconds and gave no explanation regarding resolution and same with the second. Changelog doesn't match game, I think the numbers in game are slightly off since the changelog makes sense going up to 50% discount not 45%.