Nope, not just you. It still says "For lasting the 20 minutes against the creatures, and keeping the Void Knight from death, you will be awarded 1 point which gives free experience in a Combat skill of your choice from Attack, Defence, Strength, Hitpoints, Ranged, Magic or Prayer. The amount of experience you get is your level in that skill squared and then divided by 3. If you chose Prayer, it is divided by 6." on the webpage, though.