Regarding the triathlon:
My only suggestion (for now) is that you make the directions really specific (overly specific, even) for all the quests in the Screenshot Stage, because if they're vague, then there are loopholes. Even if it's "implied," there are still loopholes, so you have to s-p-e-l-l i-t o-u-t since you're not always online for players to ask for clarification.