I think that the Smartenna+ is meant to do signal corrections. In other words it tries to determine, in a multipath environment (overlapping reflections), which signal to use. Or to determine which signal out of a possible set will give the best reception for that particular channel.
Also from what I've read, it attempts to resolve multipath issues by "combining" separately arriving signals and\or differentiating them when they can become mutually destructive by picking out the required frequency.
I can't vouch for these signal adaptation strategies but I've seen them at work previously in certain kinds of amplifiers that attempt to select a signal from a competing array of signals.
If ever the daily adjustments become too much work or bother, you may want to try this antenna and see whether it can make those adjustments for you. As in your case, it is the constant signal adjustments through antenna placements that drive people crazy. CM is smart to try and address this aspect of antenna placement because of daily signal variability though whether it truly works has yet to be determined. I don't quite know how to evaluate all these reviews - if those who have purchased it had the problems you describe above.
I know how beamforming works with Wifi routers but haven't been able to get my mind around beamforming in the case of television. These two cases are different.