This is not Apple's fault. Both the iOS 9 and Watch OS installation notes clearly state that downgrading is not supported.DO NOT INSTALL BETAS ON DEVICES YOU NEED FOR DAILY USE. At least not for several iterations until they are stable enough to suit you (monitor forums for feedback).
                    
                  
                
              
              
                
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		App & System Services
  	
                
                
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		Core OS
		
  	
                  
                
              
              
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