Quote Originally Posted by Nyalia View Post
If it's working as intended, then the patch notes you quoted are incredibly misleading. [...] Those patch notes say that the skill level of other classes will only go down in certain instances, and then it explains those instances by saying it will happen when you try to go above the 300 point limit.
Successfully desynthesizing an item will raise your skill level for that class. However, this may also lower the skill level of other classes in certain instances.
* If the skill level increase would bring your combined skill level over the 300 point maximum, the skill level of other classes will be lowered.

The way it is written in no way implies that the instance listed encompasses all possible instances...