qmake conditional expressin, strange behaviour

[yagabey]

Hello,

I am trying to write a conditional expression on my .pro file:

DEFINES += MIKRODIAGRAM_EDITOR
contains(DEFINES, MIKRODIAGRAM_EDITOR) {
    SUBDIRS   += diagramEditor
    warning(DiagramEditor Plugin activated)
}
else{
    SUBDIRS   += scadaEditor
    warning(ScadaEditor Plugin  activated)
}

DEFINES += MIKRODIAGRAM_EDITOR
contains(DEFINES, MIKRODIAGRAM_EDITOR) {
    SUBDIRS   += diagramEditor
    warning(DiagramEditor Plugin activated)
}
else{
    SUBDIRS   += scadaEditor
    warning(ScadaEditor Plugin  activated)
}

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On Qt Creator(3.1) output console , I see only "DiagramEditor Plugin activated" text as it should. But Qt Creator adds both "diagramEditor" and "scadaEditor" folders to the project tree. Is this a bug or something else?

Thanks in advance...