Okay, well those images are enlightening!
We may need a DSP Studio expert to sort all that out.
The first thing I note, in the first image, is that you have a 8 channel input, but you are still copying channels via the Parametric Equaliser by the look of if, as if the source has just two channels. If you have an 8 channel source, you shouldn't need to copy any of those channels, just pass them through MC unchanged. So you need a Zone and a Zone Switch Rule for all 7.1 sounds sources. Research those two things in the Wiki and Forum, and you will find lots of information.
The second image is a little strange, in that you start with a 2 channel source, then copy those channels to all 7.1 channels, but the output is still 2 channels. What is shown below the "Low-pass at 400Hz (Left)"? That filter seems to be repeated on the next line BTW. One way that a 7.1 signal will be shown as a 2 channel output is if the output is being encoded using Dolby Digital or DTS. One other hint that this is the case is that the 2 channel input is 16bit, but the output is 24bit. So more processing than is visible is being done to the audio stream. You will need a separate Zone and Zone Switch rule for true 2 channel sources, if you wish to copy them that way.
Or you could just turn on "Output Format" in the DSP Studio, and set the "Channels" to 7.1, and the "Mixing" to JRSS mixing. Then MC will do all the copying around of channels, or upmixing, for you. But if you have specific filters that you want to use, that give a different result to the standard "Output Format", then at least two Zones will the required for the different processing required, based on the different number of channels in the source.
Personally I just set the Output Format to 5.1 (which is all my Receiver supports), and then encode to Dolby Digital as I am using an optical connection to the Receiver, as optical only supports 2 channels of PCM. If you are using a HDMI connection to your Amp/Receiver, then it should carry the full 7.1 output without needing to encode it.
Perhaps if you described your hardware components and the way they are connected, someone will be able to shed more light on your options. I see you have looked at 8 channel convolution, so hopefully those Parametric Equaliser settings aren't as a result of setting up convolution.
Anyway, more information on the physical audio path, and a view of the lower section of the MC Audio Path will help sort the problem.