I just finished my last challenge - High Dive - which I saved for last because I could not get Laura to dive consistently until I found a reliable solution. After finishing the last couple of dives, the challenge was completed and although everything is complete in the Geothermal valley (100% in this region), it still says 98% complete on the world map. I have double checked and everything else (aside from the wicked vale) has 100% completion. Is this truly glitched? I do not want to start over and try to get 100% completion again....it took too much time to get here!