After i purchase the gold find, mythstone fine, crystal fine and monster spawn boost… All this in-app items have a 100% description but only the monster spawn boost actually change my stats points
Don’t worry, it’s only a display issue on the Adventure page. Thanks for the bug report. 
Any purchable boost from shop get applied after any Luck/MS/CS/Gold chance. So, it goes beyond the cap. But they don’t give any DMG bonus to any sets (like Satyr’s spirit). So, you won’t see any stats difference in the all stats page, if you have bought a boost.
Maybe you just fix it as soon as possible … For a beginner like me, i thought my money blown away after i purchase and i didnt see any changes happen regarding to my stats…