1) Yes, a will MUST be followed strictly; the law does not allow for wills to be adjusted later for "fairness."2) Often, a person does not inherit when they "should" have inherited under a will because the property, asset, money, etc. they were promised is gone: used up, spent, sold, gifted, transferred, etc. A will is not a guaranty of getting anything and does not limit what can be done with assets while a person is alive: a provison in a will that someone will get something should be read or understood as "IF I still have that thing I promised you when I die, then you will get it . . . ."