If you try to log in many times in a short amount of time and you aren't successful, the website will see you the same way it sees the "bots" that try to log in all day, every day. To protect the personal information of every Member and Subscriber, the website automatically blocks those bots from continuing to try to log in. So, you're getting blocked in the same way because the site can't tell you are a real person.
You can wait for your block to expire, or contact us to ask that we remove your block. Next time, don't try an incorrect password too many times in a row, and don't click the Log In button more than once while it's logging you in.