A product that is advertised with double goods is always a sham because it never contains the double goods in its full size. A good example is the famous chocolate bar Snickers. If you buy one of it then it is a lot bigger than the package with two in it.
These two bars together may be bigger than the separate one but one of the two is not as big as the usual Snickers bar. It is understandable that they do not put in two bars with the regular size because almost no one would buy the separate one then. But actually this is consumer deception.