Right, this is based on pen-and-paper working, so I could be wrong, but I think it's a red-herring, the set of "clothing" seems to be:

white, blue, yellow, and is otherwise undefined.

But we know from [1], [2], [4], [5] and [11], that the order must be:

A, B, C, D, E or A, B, E, D, C.

Which makes C either the older 12 year old or the 35 year old.

The key this is that D can't be a 12 year old without A being in slot 2, but A can't be in slot 2 because slot 2 is South Africa and A is Morocco.

Trying to reach the shoes + Vanuatu clue is a complete waste of time, paying any attention to shoes or clothing is a waste of time, it feels like there ought to be a way to narrow it down to one of those two configurations, but the clothing is too ambiguous, the shoes end up irrelevant.

What a frustrating puzzle, where half the clues are seemingly redundant.