Please, read the instructions again, you're not understanding them, and check how the test you mention now is ok too

'codewars' is a merge from 'cdwr' and 'oeas':

    s:  c o d e w a r s   = codewars
part1:  c   d   w   r     = cdwr
part2:    o   e   a   s   = oeas

Test: codewars can't be created from code and wasr.

There the s is before the r in wasr and not in codewars, see?

The restriction is that the characters in part1 and part2 are in the same order as in s.

They're not in the same order, so, the tests are ok.

Language? Proof?