HI,
I noticed the following. I had a basic page with the URL /updates. Then I created a view with two page displays with path like this /updates/page1 and /updates/page2.
However, the view was not able to place this link into the menu based on the path. It seems that the fact that a page already existed that started with the same string blocked views from adding the menu item, although I would assume that the paths are distinctively different. When I changed a path to e.g. /update/page1 it would work.
I assume this might be a bug, unless it is intentional for a reason I am not aware off. I am not sure if this would belong into the queue for menu, views or maybe even pathalias.
J.