Exactly! And you do seem to be a scammer, as you just admitted to us you got another US card only a month ago, but you're trying to not admit that to them and you're trying to trick them into thinking you're someone else.

Keep in mind that banks have all sorts of security procedures, but the front line employees are trained not to tell you that they're asking you questions to get at your identity. So you shouldn't expect an on-the-phone rep to tell you the real reason they're asking you all those questions.