Opens File in unexpected split

[beatgutzwiller]

It seems like a file is open in the first opened split. This is quite irritating. Am I doing something wrong, or is this a limitation of ack.vim ? It would be great to open the file in the last active split. And even better (at least for me) would be if ack woul behave like vinegar.vim/newtr and instead of open a quickfixlist, showing the result in the active split, and open the file there.