My GP was good enough to go to the middle level but I accidentally hit the easy level but when beat the easy level the game won’t let me advance to the next level. Is it suppose to just keep me on easy?
Unfortunately as Rebmes said you are locked into the difficulty for the entire event. Understandably mistakes happen but when selecting the difficulty you aren't locked in until you hit commit. As with everything else in this game double and triple check things before clicking on accept/commit/ok