[DCP-o-matic] DCPs with mono and 3.0 audio

Hello! I need a little help, maybe someone knows what I am doing wrong. 1. When I make a DCP (using DCP-o-Matic 1.77) and set the audio channels in the DCP Tab to 1, for a mono DCP, I end up with seeing only the left channel in the Content/Audio Tab. So rooting the audio to the center is not possible. When I do it before setting the audio channels to 1, I can root the audio to the center, but the DCP has no Audio at all in the end. And when I try to ingest it, the Doremi says "Unsupported odd number of audio channels(1)". Ingest Error. 2. When I try to make a 3.0 DCP by rooting the left and right channel also to the center and set the audio channels to 3, the Doremi is also not happy and doesnt ingest it. I know, 3.0 is not a DCI compliant, so maybe thats the reason and the solution is to not choose it? Possible workaround could be to set the DCP Name by hand and not use ISDCF Name. Setting audio channels to 6 and name it _30_ in the title, right? Thanks for your help! Andi