FA tagging

["A.W.T." <Ti@fa-kuan.muc.de>]

I recently became aware of something IMO not explicitely described in the Book:
Is it allowed to say {mi dunda do fe levi rozgu} and what does it mean? Is it equivalent to {mi dunda levi rozgu do}?
In other words: can a selbri place already occupied by a sumti *by word order* be dis-placed by a *following* tagged sumti? (I'd 
tend for this!) Or, could this mean that this tagging causes the place being occupied by two (or more) sumti (like in {fa mi fa do 
klama fe le zarci fe le zdani etc.})?

co'o mi'e .aulun.