BIND fails if one of 2 servers is bad?

[Andre Burgoyne]

Running BIND 9.2.1 (RedHat 9), I get the following results:

# dig counterpunch.org

; <<>> DiG 9.2.1 <<>> counterpunch.org
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 20001
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;counterpunch.org.              IN      A

But when I do +trace I get:

# dig counterpunch.org +trace

; <<>> DiG 9.2.1 <<>> counterpunch.org +trace
;; global options:  printcmd
...
org.                    86400   IN      NS      TLD2.ULTRADNS.NET.
org.                    86400   IN      NS      TLD1.ULTRADNS.NET.
;; Received 116 bytes from 195.206.104.13#53(M.ROOT-SERVERS.ORSC) in 192 ms

COUNTERPUNCH.ORG.       172800  IN      NS      NS.LEB.NET.
COUNTERPUNCH.ORG.       172800  IN      NS      NS.DOLEH.COM.
;; Received 100 bytes from 204.74.113.1#53(TLD2.ULTRADNS.NET) in 35 ms

counterpunch.org.       86400   IN      A       38.117.146.196
counterpunch.org.       86400   IN      NS      ns.leb.net.
;; Received 74 bytes from 206.127.55.2#53(NS.LEB.NET) in 108 ms

So NS.LEB.NET is working and answers for the domain, but when I do the
simple query (e.g. for normal web browsing) I get the server fail.
(Presumably because NS.DOLEH.COM does not exist).  Is my server somehow
mis-configured? Seems like it should answer as long as one of the name
servers is responding (isn't that the whole point of redundant servers?)

Thanks for any advice,

Andre