my parents made a willv in 2003 and need a codicil to correct the following: mother's first name is spelled Eulo should be Eula, their grandson's last name is listed Harris but now changed to Mott. My brother's and my address are incorrect and "property and assets should be shred" evenly , it should be shared. The lawyer says they would have to go in for an execution to do a codicil and would be questioned for 1 1/2 hours. My mother has dementia and would not be able to answaer any questions, and my dad is 101. My brother and I are concerned and woul like to know if the will would be legal if theses corrections are not made. Also does the Power of Attorney stops when my parents die? Thank You.