To avoid any problems use a Bloodstone, enter the End of Time, talk to Zixzax, enter the new portal, talk to everybody in the new room, leave through the portal, talk to Zixzax again and leave the End of Time before you use the next Bloodstone.
Those 2 Bloodstones should unlock the Seller of Secrets and the Respec Demon.
Last edited by eidolon; 07/08/14 12:13 PM.