Wrong pages when coding subpages

Hello.

First thank you for your module, it's very well made and usefull.

Now, I just found a strange behaviour from your module (or maybe I did something wrong). I'm currently making a custom module to create subpages. But I didn't manage to get URL aliases from the database so I used the normal path (node/XX), added what I wanted for subpages and then used your module to show the good URL for thoses subpages.

But in this case, it doesn't show the subpage but the parent page for both the parent URL (normal) and the subpage URL (strange). If I disable your module, I have the good URL (but as node/XX/subpage) with the good page.

I gave more explanations on my code on this forum post : Drupal.org, with more in my last comment.

Is it possible to keep the change of URL (as it should) but with the good page ? I don't know what to do actually for this problem. Thank you.