Untainted Paradise

I've done a like 5 of these now and at first didnt notice the experience gain I thought they would provide. So I started looking at them closer before and as I was doing some of them. So when I hovered over the area icon on the atlas it said 508% gain in this area, but once I fired a T16 waystone up for it and went inside the map mods said 254% increased experience gain. So something doesnt add up to me here GGG.