Is there a bug with Membership Pages settings?

How do we remove old pages that were created with the Membership Pages automatic "Create Page" feature?
We have two problems with the redirects on Memberships urls.
1. Our payment return is directed to an old url "registration completed" page. The Membership module is ignoring the new created page setting.
2. The accounts page is redirecting to an alternative page but this setting is to a specific Accounts page.
We have resaved Permalinks to update the site structure but this has not resolved the problem and we have attempted to create new account pages without success.
Can anyone tell us where these membership pages urls are stored?