You program is doing what you tell it to. Since you input is:

{""this"" "line" "has" "four"}
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When it delimits at " the first thing it retrieves is "" then 'this' then the last pair of qoute. Then the remaining elements are fine. Try to format your input like this:

{"this" "line" "has" "four"}
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To make it work for double " try a find and replace on "" with "

=~ s/""/"/g;
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