The wormwood and gentian are what you don't want them resistant to. The herbs in the Candida cleanse are in a much higher dose that will help target fungi spores. The probiotics are best if used after the candida cleanse as the garlic, Pau D' Arco and barberry also help to kill bacteria.
Most herbs have more than one use and how they work depends on several factors: how much is used, what they are mixed with, etc.
I am glad that you are feeling better! Maybe we are on the right track.