Adjusted Refund Recovery Rebate Credit

So I use Turbo Tax to do my dad's return.  My dad's returned was also adjusted by the IRS, however, line 30 doesn't say 1200 it says $600 and this is a calculated field based on the worksheet which also clearly designates single.  So I am not sure that this is the issue.  However, I did notice another issue that concerns me for some reason on his return even though I selected Standard Deduction Turbo Tax decided to use an itemized amount other than Std Deduction and I have no idea how or why this happened because I don't have Schedule A filled out because I know Std Deduction is better.  I have been using Turbo Tax for many years and never had any issues.  Just curious if anyone else ran into a similar issue.  Also one last thing Turbo Tax will not let me override the itemized amount which is really odd to me.  I am concerned that this may impact his taxes for this year.  Please advise