Why are breadcrumbs in my child project showing the (excluded) parent project path?

I understand that, Peter. Perhaps if i diagram, you will see why I think moving to your structure might work better for me. The current structure is as follows:

Community Parent

     My Child

One set of users can click on the link to Community Parent and use the entire merged project and should therefore get the breadcrumb reading Home>Community Parent>My Child. However, the other set of users go directly to My Child and should not see Community Parent in the breadcrumbs as currently they can click on it and use the back and forward links to navigate through it, even though it doesn't appear in the (still child) TOC.

What I want to do is this:

Your Parent

     Community Child

     My Child

I've decided I don't care if there is another name in the breadcrumbs that would represent Your Parent, the (invisible) redirecting page. What I would like to do is then call Community Child through Your Parent, which could link to My Child so that the breadcrumbs there would read Home>Your Parent>Community Child>My Child. The other link would go directly to My Child so that I would then end up with the breadcrumbs Home>Your Parent>My Child, according to my dilemma. I think I may have to add a conditional build tag to the TOC entry in Your Parent to completely exclude any access to Community Child from within My Child but as long as it solves the problem in the breadcrumbs, I'm ok with that, it is more important for me to block access to Community from the second set of users.

If you don't think this will do what I want, please let me know. I've been trying to wrap my head around another way to accomplish this other than your first suggestion but if there isn't one, I will explain it and beg for the extra server space.