So I just completed a skill which meant i moved down the tree opening up two more skills. However, one of the skills was already completed to the 1st crown level. Can anyone explain this as I have not completed the skill yet.
EDIT: I have also received no XP
Known bug - a lot of the trees have skills like that - you finish a lesson in 1 skill (or get a crown in it), it marks it as done in another one as well. Nothing you can do about that.
You can post (or search) in the subforum for the specific language for the list of pairs like that in your language so you know to look out for them.