Custom Netflow Sensor - Why do my Channel definitions fail to register

I have a custom netflow sensor using 10 channels. The details are as follows:

#1:VOIP-IN
DestinationIP[10.7.48.0/24]

#2:VOIP-OUT
SourceIP[10.7.48.0/24]

#3:SANDBOX-IN
DestinationIP[10.7.49.0/24]

#4:SANDBOX-OUT
SourceIP[10.7.49.0/24]

#5:ADMIN-IN
DestinationIP[10.7.42.0/23]

#6:ADMIN-OUT
SourceIP[10.7.42.0/23]

#7:PREPRESS-IN
DestinationIP[10.7.46.0/23]

#8:PREPRESS-OUT
SourceIP[10.7.46.0/23]

#9:SERVERS-IN
DestinationIP[10.7.40.0/23]

#10:SERVERS-OUT
SourceIP[10.7.40.0/23]

When I use this channel definition configuration, only Channels 5-10 show up in the channels and overview tabs. Channels 1-4 are all /24 subnets but from what I gather, this should work. PRTG shows no error when adding this configuration. I have also tried using SourceIP[10.7.48.*] with no luck either.

What do I need to change such that all of the above config will show up in the Channels tab, and subsequently on graphs?

channel configuration custom-sensor netflow prtg