The link is the only shorting going on with KATX (this is where Gump got his 8204 number)...anything else you've seen is retail buyer/sellers screwing around with the heads of other retailers. I'm sure the 1M buys are "all or none" trades again accomplished to establish speculation/doubt--IMHO. Is it possible the company buying...maybe, but I doubt it.
I've posted that four mutual funds which now have KATX in their portfolio's but the combined total is under 400K total shares so I don't institutional buyers at a significant level are involved yet.