My guess is it has something to do with clan battles, which are being opened to certain interested clans for a sort of "alpha testing" but are not available game-wide yet. I'm thinking either they had to make the chapter go live for everyone but only those who are selected for the alpha testing will be able to complete it for now, or only those clans that have been selected for alpha testing have Ch10 but it's not fully up-and-running for us to test out the feature yet.
tier 9, rep level 17 (25K+)
highest known rank overall #13...and sinking fast :(
need a clan? join us in the Mushroom Crowd (level 7; angryemu.com/we/mushroomcrowd.html)
Our hands have been cleansed of bloodshed...because we took all your hand sanitizer