hi,
for your information:
this is a IE 11 behaviour (chrome also behaves like this)!
if you try to connect to a DNS name it tries to connect to the default search provider page to search for that string.
you can edit a setting somewhere that it allows to try searching DNS names / aliases firts before it goes to the search page (but this could minimally decrease performance thats why its per default disabled).
if you once visited the website by its name it should remember that.
regards,
Ville