I also find that in rouge last upgrade in weapon and gauntlets have wrong values which change after buying ( e.g. weapon piercing show 96% before buying but after it show 105% and also gauntlets show armor 22% but after buying show 20%)
Can someone check but i think that something is wrong with golden ring and expert ring. With maxed golden ring i didn't see any change in gold earned from fight compared to gold earned from when i had lvl 5 golden ring (i was training on 1st monster on part 2) but upgrading expert ring raised amount of gold earned with each lvl