Ok, Gree,
The Hellgate Wendigo with a +4% Beast attack for daily guild wins stacks.
The Hellgate Trader with a +4% Magic attack for daily streaks does not stack.
Why?
Both were clearly advertised as a prize for day 2. There was nothing about not stacking.
This has actually been going on for a long time, but we really didn't care a lot when it was for something like raid honor. We did care about it when it was for raid gold output, but not much was said. This time it's an important boost.
THIS NEEDS TO BE FIXED NOW!
Everyone please bombard Gree with tickets until this gets fixed. This is another example of poor programming and/or false advertising. Don't put up with it anymore