If you have your browser set to save passwords, you would probably need to go into the browser settings and manually delete the wrong password yourself. I do this from time to time and am always surprised to find how many sites I seem to have two passwords for,
. How you do this will depend a bit on which browser you are using. These days most of them initially hide the passwords when you navigate to the appropriate page, so you need to click on the setting to view them, to make sure you are deleting redundant ones only.