How is it possible that my approval (thumbs up) rating dropped from 92% to 81% overnight (my time)?

The last time I was logged in I saw 92.3% approval on my account page.
Today it is 81.4%.
I know one member of SideTaker parrticularly dislikes me, but unless he went through and systematically voted me down... how is such a large drop able to occur?
By Thandor 9 years ago :: General
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    MA, Professional Counseling,Therapist
    Emotional Healing-25+ years experience in helping people find solutions that work. "one of the best therapists here" $2.49/minute
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    MA-MS, MHT-MHRS
    I have extensive training and expertise in clinical, counseling, transpersonal/integral psychology and coaching. I provide support to those willing to work on themselves… $2.75/minute
       4.84/5
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