I hope someone smarter than me can comment on it. The only thing I will say is that I think your volume for 5/23 is incorrect. If I am not mistaken it was something like 19 billion.
Historically, when someone has sold pre FS splits shares in error the norm has not been to simply return the money via an insurance pay out. Generally, the short position had to be covered in the market place. If that happens here GVRP will go to the moon.