You had the "View achievements with titles" active. That one filters out most of the achievements.
i think its for everyone now. They changed from random number of open slots to fixed 3. I think its for all weapons and not just the Dawnrift weapon selection chest.
Your region probably got switched. Check on the Launcher, next to Start button that the correct region is selected.
Few issues with soulboost event
in General Discussion
Posted
I think you can access easy mode cos it never counted towards rankings.