Problem with custom challenge

Games Other Halo
1

When I make a challenge, I make one for each one
Kills
Headshots
Wins

but when I try to make one for mteals, it says that I already have one with the same goal, and there are only three of them up there, and not one of them is for metals.
What is up with this?

2

the problem is that headshots will give you a medal, so the challenge maker sees this as a doubling. your best bet is to go with headshots, medals doesn’t give much along the lines of cr.