How do you complete a suit when you can only get it by completing the suit set?

How can you tell which is the unposed version and which is the posed version?

Up the top of the suit it will have a series icon with a plus beside it. Click this plus and it will show both the pose options. The one with no little icon on it will be the unposed version!
Hope this helps!

I have looked at the unposed version and it shows the entire suit complete, but I am unable to claim the gift box to complete the suit and receive the posed version. Please help!