Recursive queries and lame nameservers

Hi guys,

I am relatively new to DNS, however I managed to successfully configured BIND on 2 servers - one slave and other master.

Servers are on 2 different locations, each having it's own public IP - each public IP is also nameserver (ns1 and ns2).

Zones are managed only from ns1 server because they are automatic transfered to ns2.

The question:
why does intodns.com analyses show 2 errors on same IP (ns2):

- recursive querries
- lame server

Thnx for your help,

G.