You'll get a completely different password if you start at the second line.

In theory, it is possible to occur that two different passwords produce the same hash.

Would a computer back then be programmed to alert anyone that one user is trying many different passwords?

Try and use creative, different, strong passwords for all accounts one uses.

Be sure to use different passwords for each account so if one is compromised the rest are safe.

Mix up letters and numbers and use a different password for each online account.

The following article makes a great point - it is prudent to have a different password for ever site that needs one.

But you have different passwords for every site.

It is theoretically possible that two different passwords could result in exactly the same hash.

The battle mode has ten stages, which can be changed using two different passwords.