It seems to me like you are messing with them too much.
Never ever mist the flowers. They can't handle it. They will almost instantly go limp and drop off. Only mist the leaves if you have too. I would try not to mist much at all when they are flowering.
What kind of water are you using to mist? I wouldn't recommend tap water, as most municipal supplies have high percentages of calcium in them which becomes calcium carbonate (chalk) when the water evaporates. You are then left with a thin film of chalk on your leaves which becomes thicker and thicker the more you spray. There are probably other minerals being deposited as well. These mineral films interfere with natural respiration/transpiration of the leaves and the plant as a whole. Other growers here might use tap water, and there are many knowledgeable folks here, so we can wait for them to chime in with their ideas.
I spray my orchids, but only use distilled water, and I never spray the blooms. I have my own distiller. In my opinion, even purified tap water is also not good enough, since you can never remove all the resolved minerals with a conventional filtration method. I can give you information on a good distiller if you are interested.
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Also my personal recommendation would be don't turn them so often. Other more experienced growers might have more information on this, but they can maybe give you a method that is successful for them..i.e. frequency and amount, times of year, etc.
It also sounds to me like you have a developing keiki (baby individual plant) developing on one of your flower spikes. This can be a good thing. I found my first one early this morning on a dendrobium plant of mine. Let it develop roots and grow until the point where you think it would be successful to separate and plant on its own, then plant it in a small pot separately. If it stays healthy throughout the process and has a good enough root system, it should develop into another viable plant.