Drupal 7: Localhost/user link defaults to website/user
Some typical items you may want to check:
Check if you get the same problem using another browser. If with another browser it works, then it is pretty sure a cookie problem. To solve that, delete the cookie in the browser where you have the problem.
Make sure "clean urls" is enabled. Refer to "https://drupal.stackexchange.com/questions/165029/clean-url-leads-to-duplicate-url-after-migration-to-another-hosting/165044?s=1%7C3.9647#165044" for more details on that.
Make sure the value of "base_url" is set correctly (in your settings.php).
If module Secure Pages is enabled, then try to (at least temporary) disable that moduel to see if it helps.