5 Stack Strength of Earth @ lvl 120 with 113.2 earth attunement, gives +26.6 Strength, single stack gives +33.3 strength. Should be +40, when stacking the tool tips are showing the correct values. 5 Stack Purify Burst @ lvl 100 gives + 16 Death Resist, single stack gives +20. Should be +24 and tool tips are showing the correct values when stacking. Seems that stacking is working in reverse subtracting the value vs adding, and appears to be effecting all stack-able abilities.