A:AnswerContacted Eufy and was informed that this should not be the case. My second lock does not work with the original key, but the first lock works with both keys so it appears that the first lock is defective. Working with support to have it replaced. (Edit - this is the OP just in case the username is different... not suer why)
A:AnswerBHMA Certified instead of ANSI
Tested by BHMA—the leading authority on hardware build quality—to work after locking and unlocking 250,000 times. That means you can use Smart Lock Touch & Wi-Fi up to 10 times a day for over 30 years.