Prevent Partial Permalinks from Resolving

I recently moved a blog from mydomain.com/blog to mydomain.com using the guide in teh codex.

At first, the move seemed just fine, but then I realized that mydomain.com/blog now redirects to the oldest post I’d written whose slug begins with “blog”.

I use the /%year%/%monthnum%/%day%/%postname%/ permalink structure.

a) Is there a way to prevent mydomain.com/full from redirecting to mydomain.com/year/mo/dy/full-slug

b) Is there a clean way to always redirect mydomain.com/blog to mydomain, so users don’t get confused by a 404.