I installed a fan to come on at 79.6 and turn off at 79.6... the first day it worked great with the graph showing a very consistent swing from 79.6 to 79.7 back down to 79.6 and so on as the fan cycled on and off... it is still working great but today after messing around with some other things it is now going from 79.7 the fans come on and cool it to 79.5 and then going back to 79.7 I'm by no means complaining about this .2 swing. Just wondering if I am missing something because it was working "better" if you can even call it that.