I have never come across anything like this, I naturally assumed the progressions according to the Wins with (1) solution to get to 1.

How do I correctly read this?

Hi!

First we are told R<C, then that R<S

we have no information if S<C or C<S

so the orders R<C<S and R<S<C are both valid.

Thus there are more than one order of preference possible to satisfy the conclusion made in square 1.