Hello! 

Test distinct-duration-equal-2 runs the query 
“fn:distinct-values((xs:yearMonthDuration('P1Y'), xs:dayTimeDuration('P365D')))” and expects the result “<doc>P1Y P365D</doc>”. 

However, http://www.w3.org/TR/2007/REC-xpath-functions-20070123/#func-distinct-values says that “[t]he order in which the sequence of values is returned is ·implementation dependent·.” 

Unless I'm missing something, this means that “<doc>P365D P1Y</doc>” is also a valid result, and should be added to the expected results list.

Similar considerations apply to K-SeqDistinctValuesFunc-6, which expects that 
  “deep-equal(
	distinct-values(
		("1", 1, 2, 1, 1, 3, 1, 1, 3, 
		 xs:anyURI("example.com/"), xs:anyURI("example.com/")
		)
	), ("1", 1, 2, 3, xs:anyURI("example.com/"))
   )” should return true, even though distinct-values may reorder elements.

Also, I think ns-queries-results-q1 also has this problem, but I'm not that far in implementation to be sure.