Possible error in custom template recognition mp_store.php

I have set up a custom template file: mp_store.php that is recognized as the template to use when visiting mydomain.com/store


Now the problem occurs when I go to my admin section, and select "store" to be my start page.

The expect behavior would be to go to the dashboard, go to settings > reading > front page displays > choose static page > then choose store.

After saving changes the store is now the default static page when going to mydomain.com

HOWEVER instead of the template mp_store.php being recognized, instead it is recognizing the default marketpress view for store.

I think this is bug I found, probably a simple fix for the developer. OR am I doing something wrong. Please note my mp_store.php template IS recognized when store is not chosen as the default static landing page for the site.