You can do both the human and Raanaar quests. Have you installed the
patch?
Even if a couple quests are messed up it is not too hard to get to second place in the rankings. For some cases where the quest object was found before getting the quest, people were able to drop the item outside the immediate area and talk to the NPC again to trigger the required speech option, then get the quest item to complete the quest.
The ranking quests;
Act3 problem need helpHow many quests are messed up? If enough ranking quests are broke unfixably that you can not reach second place, then you will have to reload an earlier save, but otherwise it is probably not necessary.
There are also problems with some of the quest log entries for act 3, particularly with the Raanaar quests, which are mostly cosmetic and shouldn't interfere with completing the quests.