Plains of Ashford Waypoints.
You’re missing the ‘new’ one in the very SW corner of the map where the Guild Puzzle is.
The 19th Waypoint should be in the south west corner:
http://wiki.guildwars2.com/images/b/bf/Plains_of_Ashford_map.jpg
Almost directly south of Guardpoint Demicus Waypoint (Demicus Stones area).
[Azure] ~ Darkhaven
Thank you so much guys.