Error with dynamic update

[Flex Banana]

hello list,

I have the following message via the syslog of my system:

May  4 14:51:10 vl005000 dhcpd: DHCPREQUEST for 10.28.25.200 (10.28.25.50) from 00:1b:63:37:98:c2 (lm000961) via eth0
May  4 14:51:10 vl005000 dhcpd: DHCPACK on 10.28.25.200 to 00:1b:63:37:98:c2 (lm000961) via eth0
May  4 14:51:10 vl005000 named[15432]: client 10.88.94.50#47193: view ETH1: signer "vl005000" approved
May  4 14:51:10 vl005000 named[15432]: client 10.88.94.50#47193: view ETH1: updating zone 'lausanne.edu-vd/IN': deleting rrset at 'lm000961.lausanne.edu-vd' A
May  4 14:51:10 vl005000 named[15432]: client 10.88.94.50#47193: view ETH1: updating zone 'lausanne.edu-vd/IN': adding an RR at 'lm000961.lausanne.edu-vd' A
May  4 14:51:10 vl005000 dhcpd: Added new forward map from lm000961.lausanne.edu-vd to 10.28.25.200

May  4 14:51:10 vl005000 named[15432]: client 10.28.25.50#47193: view ETH0: signer "vl005000" approved
May  4 14:51:10 vl005000 named[15432]: client 10.28.25.50#47193: view ETH0: updating zone '25.28.10.in-addr.arpa/IN': deleting rrset at '200.25.28.10.in-addr.arpa' PTR
May  4 14:51:10 vl005000 named[15432]: client 10.28.25.50#47193: view ETH0: updating zone '25.28.10.in-addr.arpa/IN': adding an RR at '200.25.28.10.in-addr.arpa' PTR
May  4 14:51:10 vl005000 dhcpd: Added reverse map from 200.25.28.10.in-addr.arpa. to lm000961.lausanne.edu-vd

The server has two nic: 10.28.25.50 and 10.88.94.50.
When i plug a client on the 10.28.25 network, this will receive an ip address (10.28.25.200 in the example) and update the zone lausanne.edu-vd, this is the first part of the message
The problem is that is update the zone with the second nic 10.88.94.50 and update really the zone lausanne.edu-vd from the other view on the 10.88.94 network

The second part of the message update the correct in-addr.arpa zone from the 10.28.25 network, all is perfect.

Anyone can help me understand what is the problem ?

Thank you list
Banana