Can it be a mistake if she failed to spot the error that the corrector made by marking her work as an error when it was not an error, or is it a simple rectification that is needed? What we certainly cannot have is a process by which the error spotter makes errors when there is no actual original error, and so their reaction action becomes an error in itself. Unless of course their error is spotted not by the person whose work it is they are checking but by another person whose work it is not.
Therefore an original piece of work which was miscategorised as an error remains an error unless the originator spots the error made by the error checker, and not by some itinerant passer-by. Do you see how clearly the system works? It obfuscates the real impacts of a malformed and mis-trained workforce by allowing mistakes to go on unimpeded by the right and wrongs of the ‘business laws’ to which the lower workers are subjected to. Any formal declaration of a contrast of interests, of an appeal, is buried by email after email after email and, with any luck, forgotten about by the original appealer whose work has, supposedly, already been checked and corrected.
It is, I think you will agree, a perfect machine, hiding its imperfections in plain sight but sparing no blushes when it comes to the highlighting of work well done, if it is done at all that is.
So yes, she should have kept quiet about her work that was an error but was not spotted by her alone. Rather time is well spent going through the errors on her behalf of her own errors, if she deems that she has time to do so. Work is, after all, a timed affair where targets must be met, money must be spent, satisfaction must be the number one customer benefit even, they say, at the cost of an efficient process.
So surround yourself with cronies during employment and you will never have to work again, but deliver your work out disguised as work that others should do and divide it piecemeal fashion to those that are not within your circle of influence. Merge those relationships between friend and foe, between boss and employee, and you, my friend, have a recipe for most businesses today.
Of course she will remain disenfranchised, chained to a system that not only pretends to acknowledge her as an active agent within the workforce but progressively attempts to ignore her even during an appeal. After all the work still has to be done, the targets must be met.