i believe i saw this subject tackled in another thread but it was somewhat worded in a confusing manner. i figured i'd just make a new topic and hope for the best. ^_^
are current completed quests being tracked for future tiers? if so, is this based on our personal high scores for each quest?
thanks!

Only if an achievement already exists for the quest, your quests count. For example since there were already Maleria quest achievements, when they added the 100 tier I had 400/100 because it kept counting.
When they added Shinwa however, I had to start at 0 even though my scores show me completing over 100 because it was a new achievement.