Sure, they can do that, but now it’s after the fact. The clock is ticking, and you have a whole process to go thru to get your name on that ballot before they are printed. If there is even a process at all, which is uncertain at this point.
Question is, why expend all that effort and resources after the fact when it would have been easier to get a shenanigans-free level of signatures?
Did it actually ever occur to you to ask why the frontrunner who actually LIVES in Virginia was not advised as to the pitfalls that we are discussing today that befell him?