I have the same sort of problem
Krytan Explorer 175/175, Completed;
Orr Explorer 60/60, Completed;
Maguuma Explorer 166/166, Completed;
Shiverpeak Explorer 174/174, Completed;
Ascalon Explorer 176/176, Completed.
I have completed all WvW maps.
I have Chantry of Secrets POI.
I have 100% in every area and have received all the reward chests for this
but my World Completion bar reads: 99%.
Hearts: 301/301
Waypoints: 507/507
POI: 711/719
Skills: 202/202
Vistas: 261/266
there are no more vistas or pois left for me to do… this is very frustrating :/