New International Version
“The first lot, which was for Asaph, fell to Joseph, his sons and relatives 12 the second to Gedaliah, him and his relatives and sons 12”
Over and over they kept saying each lot fell to 12.
This appears to be 12 was this specific job and each time someone drew 12, the received the said job. “God allowed the Israelites to cast lots in order to determine His will for a given situation…”