The title is a bit misleading but here's my situation. I'm currently logging in from two different places, my house and my cousin's. The first time I tried to log in from my cousin's, my account was restricted but I was able to log in once I've went to my e-mail and changed my password. I thought that this would "whitelist" my cousin's IP address for my account but it turns out that I have to do this EVERY TIME I log in from my cousin's place. Not only that but his own account is also getting flagged and restricted from this.

My questions are: 1) Is there any way to "whitelist" another IP address for an account? 2) Should my cousin's account be getting flagged too or is there something wrong with the security on my cousin's computer?