Hashed passwords are NOT similar although the salt and password are similar

I had created two users on Linux with the same exact passwords, but when I looked at the /etc/shadow file, I found that the hashed values look different, although the salt file is the same. (Please see below, j9T is the salt). Why the hashed passwords are NOT similar, although the slat and password are similar? # tail /etc/shadow Bob:$y$**j9T**$ewJ0HB756BZDnPjx7zzbm0$i39AKrfuQuvvoQJpujwWd7Z4bcZgN1l0IWeJsNmLzg7:19254:0:99999:7::: Bob:$y$**j9T**$pFF5c93UZvdFYD2nanxEO.$SMhaxtPUPEUZdZZx.b1tGmjXgM67nqBJgMk2sNP.5s4:19254:0:99999:7:::