Passwords

You just gave your user id and password to 7.5 billion people and I hope it will not be there too long. I requested its removal.

That message means it is a perfectly OK password, nobody has compromised you or the site but

1. That password is on a list of passwords that some site somewhere (we don’t know where) has leaked
2. you are using that same password on more than one site (naughty!)

Put those two together and you need to choose new passwords for the sites mentioned

Particularly Ashleymadison.com as you just told the whole world

My settings, passwords does not show last accessed date, only password modified date.

Even security warnings

The warnings about compromised passwords do not suggest that you have in any way been compromised or the website you accessed with it was compromised.

More advice

If you use a password like “Banana” then the chances of it being on a compromised list are high.

If you use “Yell0w-50metre-submar1ne” then it is much stronger to guess and unlikely anyone else used it

Yes, but it would help to know why you are concerned.

If you don’t remember ever logging into that account it could be a family member or friend using an iphone, ipad or Mac that is signed into your apple id.

Passwords are managed in Keychain which is shared between your Apple devices via iCloud.

That is the normal method of getting them in there but there is a manual (+) method of adding them.

Yes