When assigned a static dhcp to a host's mac address, it should be removed from the general dhcp pool to avoid IP conflicts. This is currently not happening as sporadically device1 with a static dhcp address set will have it's ip address handed to device2 if it, device1, happens to be off at the time.
If you're coming from a Windows DHCP server, this may be contrary to what you're used to - I remember that Windows 2003 Server, at least, would not let you assign static addresses that were outside the DHCP scope.
If you're coming from a Windows DHCP server, this may be contrary to what you're used to - I remember that Windows 2003 Server, at least, would not let you assign static addresses that were outside the DHCP scope.