Q: Keychain messing up commercial accounts?

Hello

I have a Login problem with Amazon.

I have a www.amazon.com account and also www.amazon.es and www.amazon.fr

I use the same email for all the accounts and until recently I "manually administrate" my passwords (1Pass and more recently mSecure)

I recently change Apple OSX system to Mavericks and I start managing my password with iCloud Keychain.

When I try to login in the .es after I visit .com It say that my password is not correct. The passwords was changed, after the first visit with a self-generated Keychain and write it, in the second visit, by Keychain which is kept hidden.

I think Keychain "don’t see” the different account. I believe that this is the problem. A bug?

The point is I have others similar accounts, like

iTunes US, iTunes UK, iTunes ES

Fnac.fr Fnac.es

etc

I am afraid that Keychain will messing up everything

Some one have experience the same problem? Any suggestion?

Thanks!