Answerbox widget appears as two columns

Hello! I recently installed Answerbox & it is great indeed!

But there’s a small issue on widget area. When I set Sidebar & AP Question Sidebar, two of’em both appear in Question page.

What I see is;

Main page : List & Sidebar

Question page : left is Question&answer, middle is AP Question Sidebar, right is Sidebar

I would like to have my Question page with AP Question Sidebar only, just as your Questions page

Thank you!