Hi Alicia,
Thanks for your feedback. I'm sorry to hear about your drain and we would be happy to review your concerns and also the installation over with you. Our PU-11 has been a customer favorite for well over a decade. We also recommend ensuring the hole within your counter top is at least 4" - 5" in diameter which would be large enough for the concave washer to be able to get pressed up against the bottom of the sink directly.
Please feel free to contact us at 800-775-0703 or email us at customerservice@kraususa.com and let us know if you have any additional questions. Happy to assist.
Best regards,
Mike
Kraus USA