Support with configuring bind9 DNS server for a private network
host1.epicsystems.local.com IN A 192.168.0.66
This record is missing a trailing dot. That means that a bind DNS server does not treat it as the fully qualified domain name you wanted to use, but rather as shorthand.
Bind will append the $ORIGIN (the zone name) to shorthand records, making that the A record for host1.epicsystems.local.com.epicsystems.local.com. which is probably not what you intended.