@Roland *******
No HCMCs fault entirely. They made the mistake.
Failure to pick up the mistake? Well how often have you written something and not realised you made a typo or transposed numbers without realising. Even after reading 3 or 4 times.
Anyone applying for a DTV will generally be ecstatic when they get it. They would very rarely go over it with a fine tooth comb, especially for a transposed passport number.
Or are you so perfect that you would never miss something like that?
FFS.