Safari Keychain issues

I have many passwords, at every time I log into one of my credit card accounts, safari picks the wrong keychain.. this is due to having many credit cards all with the same vendors between my wife and I. is there a way to customize the titles so when I click on the key within the password box I can differentiate between the sites?

Having several sites with the same parent credit card companies consistently logs one of us in under the wrong passwords, and Safari will ask after I correct the password if I wish to change it, which I do, but when I do, it changes the other cards passwords as well, creating a wrong entry in the future. Any solutions would be greatly appreciated, and any tips as well.