Assignment1 Advanced Training: Unable to attach Pages correctly

I have a problem when attaching these two browsers pages below. I Attached them through Attach Browser activity. But when I closed the small one (picture2) by clicking on the close button, it closes the widely spread window(picture1).Could someone plaese help me? Thanks


Could you please check Selectors of both windows and make it reliable Selector.

the selectors linked to the following window…I don’t know what to do. Do you have a hint?