Unfortunately I'm not much help when it comes to using plugins like Network Recorder -> Sage DCT. This one wasn't written by me, and I'm not familiar with how it works. Hopefully Martin will have some more ideas.
SageDCT and NetworkRecorder seem to be working fine. Channels are tuning and growing as expected. The only thing that I saw that might be an issue was (I think a bogus EOF during the play)
which looks like it caused NextPVR to instantiate another NetworkRecorder instance.
Since this is an SD channel it is possible that it is low bit rate and DirectShow reports EOF when an internal buffer is empty. If HD works but SD don't increase the delay further.