Oh, the formatting on my post is awful, so it probably doesn't help that you can't tell what my content tree looks like. I'll try again...
We want users to be able to create a page (custom page type we're calling Review) from anywhere on the site (there would basically just be a link to create a new review on any of the numbered review pages, which opens a contribution list form to create a Review page), and based on the fields they select when they create the page, automatically put the page in the correct place in the content tree. The issue with CurrentDocument is that the URL will have nothing to do with the user's location on the site, unless I'm misunderstanding how that works.
All AppAlias is doing is grabbing the Alias Name of whatever page is selected in the Application dropdown list in order for me to construct the URL of the intended destination. For example, I select App 1 from the dropdown, and AppAlias is set to App-1, so /Applications/{%AppAlias%}/Reviews/% becomes /Applications/App-1/Reviews/%, which is where I want the page to be created. If I select App 2 from the dropdown, I want the page to be created under /Applications/App-2/Reviews/%. The problem I'm having is that, no matter which App I select from the dropdown, the page is always created under /Applications/App-1/Reviews/% because App 1 is the default selection for the dropdown.
If this still doesn't make sense, I can try to find a way to rephrase my question.
Thanks!