DHCP server and client lease question
 

I am running a Slackware 10.2 box with webmin. I am among other things running a DHCP server on this box. My problem is that when I go into Webmin and look at the active client leases, there are multiple entries for each Mac/IP address (they are the same addresses, but have a different start/end lease time). This is more of a nuisance than anything else. Is there a setting I can change that will "clean up" some of the duplicates?