Why can't I have duplicate values in List Box?

[#1]

If I run this:

lb = List Box({"qwerqwerr", "qwerqwerr"});

nwTest = New Window("Test ListBox Duplicate values", lb);

I will get a List Box with only one line. Why?

List Box accepts lists, lists can have duplicate values, why can't Lis Box have duplicate values?

If I pass a list with duplicate values to List Box, what's shown in the List Box is not the list that was passed with now additional warnings or errors.

IS it by design? Why? Any workarounds?

[#2]

You named two different String Col Boxes in two different windows the same name. So the second assignment overwrites the first one.

Funny behavior => no matter buttons in which window I press, the second window updates.

[#3]

That 'control' is a composite object starting with an outline box. You can investigate the structure (display tree) by right-clicking the outline box and select Edit > Show Tree Structure. The list is presented in a List Box, the same object you started with.