Dear M,
It sounds like you've done well to look at this from several sides instead of flying off on the first emotional tangent / reaction. Reiki as we know (endevour to know) now is still in a very embrionic stage in relationship our current collective human experience. Even the best of the best Reiki practitioners will tell you that they don't fully understand it. The practitioners that boldly declare thier Reiki mastership are the one's be wary of.
Reiki chanelling is big time dependant on the Mindfulness of the practioner. It is the Mindfulness of the practitioner that faciltates whether you get clear Reiki and/or some energetic slop that you don't want or need. That been said it sounds like your Higher and Lower Self are indicating that you should move on.
Namaste,
Michael