Once you achieve High Skill increases do not update immediately:
Terraforming: 95+, Had taken a few days to reach 100 due to incongruousness raises about week back.
Scavenging: 96+, Just received an increase and skill didn't raise. Relog'd and still did not show change.
Scavenging: 97=, logged in some time later and skill showed correct value.
Have noticed issue w/ running, bone-crafting, and hiding skills as well.