Shield throw - testament of light - wrong calculation

The node “Testament of Light” isn’t working correctly
When I hit my allies with Shield Throw they get about 680 armor.

Aegis (node before Testament of Light) states it gives 500 armor
Testament of Light states it increases the effect of Aegis by 6% per point of attunement.

I have 100 attunement which should be 600% increased effect of Aegis
600% increased effect of 500 flat Armor should be 3000 armor (instead of the current 680 armor)