1040X to add Sched C for indiv (dependent). Resulting 1040X did not pick up correct orig data, nor compute correct AGI, I had to override to get correct 1040X

I did a 1040X on a return to add a Schedule C for an individual who was a dependent.  The resulting 1040X did not pick up the correct original standard deduction, which was an adjusted standard deduction because the taxpayer was a dependent.  It did not compute the original correct taxable income which was zero.  It did not compute the original overpayment on the return.   I had to override the 1040X in several places because it was wrong.  Has anyone else had this problem?