I'm not sure I get your question. And it is hard to respond because there are so many different DOpus settings and QAP options that can change the response.
One thing I can say is that QAP will not add any tab or lister if you open the QAP menu over an existing lister. In this case, QAP will change the folder inside this existing tab.
On the other hand, if you open the QAP menu over any other window and select a folder favorite, it will open it in a new tab on the active side of the active lister. This could be different depending on your QAP "Options, File Managers" for DOpus.