Confused A.server ?

[alex]

When default server is auth01.dns.cube.com and root server A is asked for
www00.com data it replies with:

> root
Default Server:  A.ROOT-SERVERS.NET
Address:  198.41.0.4

> www00.com
Server:  A.ROOT-SERVERS.NET
Address:  198.41.0.4

CUBE.COM        nameserver = AUTH01.DNS.CUBE.COM
CUBE.COM        nameserver = AUTH02.DNS.CUBE.COM
AUTH01.DNS.CUBE.COM     internet address = 207.242.168.4
AUTH02.DNS.CUBE.COM     internet address = 207.242.168.5



But when default server is sirius.www00.com, The A server says :
> root
Default Server:  a.root-servers.net
Address:  198.41.0.4

> www00.com
Server:  a.root-servers.net
Address:  198.41.0.4

Name:    www00.com.sirius.www00.com
Served by:
- AUTH02.DNS.CUBE.COM
          207.242.168.5
          WWW00.COM
- SIRIUS.WWW00.COM
          12.14.30.199
          WWW00.COM



Why do this two inquieryies does not match???

alex