If you don't want a second necklace you have to choose No Thank you under the Optional Second Necklace. It's just the way our system is set up to create the drop pages. You are not required to order a second one if you don't want it. Hope that helps!
Graciezsc - I found the blue/green on on Amazon and it was $25 with free shipping over $35 for qualified items (without Prime). This drop does seem like a deal.