There is more then one type of aetheryte ticket. There are several that send you only to specific locations. One for the waking sands, one for your grand company headquarters, a few you might not be far enough in story to use yet. Then there are also generic aetheryte tickets. The generic ones will work on any teleport in the way you have set up, the location specific ones are only for their specific purposes. Without seeing your inventory, this is my guess as to what is happening.