On my wordpress siteground staging copy all links including login page sends me to the live website. Wherever I click or try to login I get sent to the live website. Any idea what the issue could be?
Move wordpress websites, requires some steps.
1 - Change siteurl field in the table wp_options to or the follow code on your config file:
define('WP_SITEURL', 'http://www.new-domain.com');
define('WP_HOME', 'http://www.new-domain.com');
2 - Search and replace links from one site to another using SQL.
SELECT wp_posts.post_content FROM `wp_posts` WHERE wp_posts.post_content like '%http://www.old-domain.com/%'
UPDATE wp_posts set post_content = REPLACE(post_content,'http://www.old-domain.com/','http://www.new-domain.com/')
Moreover, the plugin WP Migrate DB is a good alternative. - https://wordpress.org/plugins/wp-migrate-db/
Finally. You should never forget perform a full website backup ( Including files and the MYSQL DB ) before start with the process.
Thanks. Regards, Ed.