Same IP, multiple A entries within DNS, tied to multiple hostnames.

Hi Guys...
I am in a bit of a fix. Two machines are replying with the same IP address but different hostnames. No, none of them is multihomed!!

I have both DNS and WINS enabled on my network.

Here's what exactly happens on my Windows 2003 AD network:
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C:\Documents and Settings\f.s>ping ABC
Pinging abc.cnn.com [192.168.14.26] with 32 bytes of data:
Reply from 192.168.14.26: bytes=32 time<1ms TTL=127
Reply from 192.168.14.26: bytes=32 time<1ms TTL=127
Reply from 192.168.14.26: bytes=32 time<1ms TTL=127
Reply from 192.168.14.26: bytes=32 time<1ms TTL=127

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Then I give the command:

C:\Documents and Settings\f.s>nbtstat -a 192.168.14.26
Local Area Connection 3:
Node IpAddress: [192.168.16.76] Scope Id: []

NetBIOS Remote Machine Name Table

Name Type Status
---------------------------------------------
XYZ <00> UNIQUE Registered
PCDOMAIN <00> GROUP Registered
XYZ <20> UNIQUE Registered
PCDOMAIN <1E> GROUP Registered

MAC Address = 00-04-75-E3-A4-1C
------------------------------------------------------------------------------

C:\Documents and Settings\f.s>ping xyz

Pinging xyz.cnn.com [192.168.14.26] with 32 bytes of data:

Reply from 192.168.14.26: bytes=32 time<1ms TTL=127
Reply from 192.168.14.26: bytes=32 time<1ms TTL=127
Reply from 192.168.14.26: bytes=32 time<1ms TTL=127
Reply from 192.168.14.26: bytes=32 time<1ms TTL=127

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I have confirmed that machine abc.cnn.com doesn't physically exist on my network, only machine xyz does.

Both the machines, ABC adn XYZ have an 'A' entry on my DNS server.

So, why and how does this entry of ABC come from? My IP addresses are dynamically allocated but then why is DNS/WINS keeping some old entries?

Any clues??