The realtor who hired me to clear a home says that the sellers are pushing away showings and being negative. What is going on? Would another clearing with the Lightworker Healing Protocol and Deep Subconscious Mind Reset be helpful?

The origin of this behavior is karmic and it is clearly self-defeating as you are seeing play out. They have valid reasons for wanting to sell but have conflicts about it and feeling conflicted is enough to stir the karmic pot and ramp up emotional energy, and trigger emotional consequences that cause rash actions that act as the building of a logjam to prevent forward movement. So more healing is the perfect answer here as being the only way to shift the energies more to the positive and allow forward progress with the sale of their home.