Cup tie mapping - team missing.

I have created a cup competition in which I am required to use tie mapping. I have used tie mapping in various competitions before but, for some reason, I am having problems with this one.

In the screenshots, I have the cup tie mapping in which 2nd place in group 1 plays 2nd place in group 2 and 3rd plays 3rd. However, you can see in the second screenshot that the 3rd place team from group 2 never actually enters the playoff.

As I mentioned, I have used tie mapping before but this is the first time I have encountered this issue. It will always be with the 3rd place team in group 2, regardless of who I set their opponent as or whether they play in the first or second match.

Does anyone have any ideas?