In the last subconscious channeling/HMR session for a client, the old belief was gone, but the new belief didn’t stick, according to muscle testing. Is that an accurate assessment? What are we doing wrong?

That is an accurate assessment. You are not doing anything wrong. What is happening is that the divine replacement is bumping into other inner beliefs that are an obstacle to accepting the new belief and its implications. While intended to be a simple replacement for the old belief in this instance, it is not always possible to do a complete 180° turnaround and have that fully accepted and integrated by the mind. So this is simply a question of the wording and the semantics and the exact energies and their energetic signature that the words represent. Simple language and simple general beliefs of the kind that are encountered doing this process will not be fully descriptive of all the nuances that are in play karmically. So what sounds like an equal replacement might actually be a larger gain than simply reversing the old belief that has been removed and that might have inner resistance, still, to being fully accepted. So there is, in this case, some more work needing to be done that can happen through the ongoing LHP work and not necessarily needing a return engagement to deal with that roadblock specifically. But that is an option as well, to start with the desired new belief and make that the issue. Sometimes the roadblock is not a belief easy to identify and for the mind to describe, because it might be coming strictly from cellular memory, which is essentially considered to be the client’s will and must be honored as a choice when it comes to the divine making changes within the person. So that is another reason that some beliefs might not be readily adopted quickly during the session itself.