Excluding IPs in bandwidth monitoring

Hi there, I'm using Shibby on an N16 to split my home and guest network at our agriturismo here in Chianti. All guest IPs are .22.50-99 on LAN1 whilest home IPs are .11.xxx on LAN. I really don't need to see a split of all the guest IPs in the IP Traffic monitoring section (looking at LAN1 .22.0 is plenty), so I wanted to exclude the range .22.50-99 from the monitoring.

Typed in xxx.xxx.22.55-99 in the Excluded IP's filed but that doesn't do anything. And just tried to list all the IPs...

Excluding IPs in bandwidth monitoring