Hello.
The indices (and therefore order) of elements in the result array is guaranteed to be the same as in the input array, so you can use that. This is a documented behavior (see e.g. www.opclabs.com/onlinedocs/Qui...).
The State property is primarily meant for use in event notifications. You are right that it is not being transferred to the result objects when used with simple synchronous calls such as this one - and that was by design actually. But when looking at this design in retrospective, there is probably no reason why the State should not be transferred. Thanks for suggestion, we will improve it in future version.
Best regards