Usually, when a second Will is drawn, the first will is destroyed.  The 
wording IS pretty much standard.  This is for a couple of *logical* reasons - 
One, so that anyone that may have a copy of the first will cannot make claim 
against the Estate (such as in the case of the terms of the Will being 
changed) and also eliminates anyone bringing forth a false document, because 
they don't like the terms of the Will.  There's a stinker in ever family you 
know :) 

Jackie Gammon   Winter Springs, Fl 
Volunteer of Random Genealogical Kindness at 
https://sites.rootsweb.com/~tnraogk/index.htm