Blocking By Schedule Problem

I have a Netgear FVS318 ProSafe VPN Firewall and one of the features is the
ability to block (or allow) service access based on a time of day schedule.

My problem is that when I set up a range of IP addresses to block per the
schedule then all IP addresses outside of that range are blocked during the
times outside of the schedule. During the time of day that the IP address range
should be blocked (and they are) those outside the range are not blocked.

In other words it doesn't seem possible to have an IP that is exempt from the
schedule and has service access ALL the time.

Am I missing something obvious here or is this a bug?

TIA