Redmine

I have two links on my main wiki page. They are A and B and each of these links/pages A and B, have an Intro page.
By default if I created the Intro page for A (using the [[]] that automatically will create a red link and a page when clicked), when then editing B, and attempt to create a link for its own Intro page it will link to the A's Intro. All the pages land under ~/wiki. There doesn't seem to be a hierarchical structure so I am wondering if here any way I can achieve what I want. I don't want to have to break down this in separate projects. It would seem like a serious limitation.

Thanks.