**First problem:** If you do two loops, you should be using different names for the WP_Query  objects (for example, $req1 and $req2 instead of two $req). Otherwise, the inner one will override the values from the outer one.

**Second problem:** You are missing $req->the_post() on the outer query. That means posts will never advance.

But do you really need a WP Loop within a WP Loop? I don't see any request for posts for the inner query, you only do a single call for WP_Query() on line 3. Maybe if you clarify what you are trying to fetch (which post types, how they nest, etc.) I can help more.