japhy got it nailed, just before I did. But my solution is different: replace 
                return  ($va->[0] <=> $vb->[0])
                        or ($va->[1] cmp $vb->[1]);

[download]
with 
                return  ($va->[0] <=> $vb->[0])
                        || ($va->[1] cmp $vb->[1]);

[download]
and it works.

p.s. Please don't make us hunt around for the question so much. When I finally found exercise 2 in that section, it simply referred me to another exercise in a different section! How hard is quoting a question of 2 lines?

In reply to Re: Sorting problem with Orcish Manuever by bart
in thread Sorting problem with Orcish Manuever by roboticus

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