Ever since I can remember, the Aldgoat Billys otw to Camp Broken Water do no appear, or show on map, until you are, essentially, right on them.

Today, in that same (eastern part of the) triangle - (Thanalan 41/35-36) the birds and eyes only show on the way north, when you get past them to the north and head back south, they are no on the map nor are they even visible until you get south of them again. Because both aggro, this is more of an issue than the billys.