<human>: Hi there! I don't have the best credit, so I applied online for a Cap One Platinum card earlier this month. Within 10 days, it was in my hand and activated. I've been using this card a little, but today I got another card in the mail. 

It's the same card, limit, and APR (because, well, it's still issued to me), but the expiration date is earlier and the numbers are different. I did not call Cap One and apply for a second, and I can't think of another time I went online to apply for the exact same card.

What should my course of action be? Just cut it? Use it? Call the bank to ask what's up?

Can you condense the text into a few key points?
<bot>: Applied for first card and got it in the mail. Two weeks later I'm sent another card with different numbers. What the what?*