Unable to do POS after faction change.

Previously was Alliance and I've completed the quests for FOS and POS on Alliance side; however, after faction changing to Horde I am unable to enter POS until I have completed "Echoes of Tortured Souls" which is not available to pick up from Lady Sylvanas Windrunner.

Can't figure out where/how to post this on bug-tracker. Any help there?

Thanks

Yea that happens when you faction change you need to do the whole thing again take the quest from Dalaran go FOS then you will get the quest for POS and then for HOR