If someone takes a challenge from the grid, completes zero of the steps to finish it, and another club member comes in and clicks "Help out" or whatever it says, and completes all parts of the challenge, it shows that the person who took the challenge under "Completed by", and then the person who actually completed the entire challenge under "Helped out by" or something like that.

It should be the person who completed the majority of the tasks as "Completed by" and the other person as "Helped out by".