Access to a solution for quest points.

Today was the first time when I bought access to solutions for QP (I am ashamed of myself ;-)). At the same time, the cost of the task was added to my experience. It seems strange to me that the points of my experience have increased and the task was marked as solved. In fact, for 10 quest points, I received - access to solution, 50 experience points and task considered completed, 10 quest points (5, 3 ,2), because two quests for 50 experience points were completed at once and weekly bonus. It's a bug or a feature?