I am seeing Horde quests while on my alliance character in Feralas. Havent noticed it in other zones with both faction hubs.

Thank you for the update!

It helps a lot if you can name the quests or even better give us their quest ids. It is hard to fix if you need to check the complete zone.

From Rok Orhan:
The Ogres of Feralas (lvl43) ID 2975
Dark Ceremony (lvl46) ID 2979
The Ogres of Feralas (lvl44) ID 2980

From Talo Thornhoof:
Dark Heart (lvl 50) ID 3062
Vengeance on the Northspring (lvl50) ID 3063
The Strength of Corruption (lvl52) ID 4120

Sorry, hope this is what you were looking for.

I just pushed a change to Grail smaitch/Grail@f513258 which marks these two quest givers as Horde, which should make those quests unobtainable for Alliance characters.