I don't know if it's possible for them to correct it at this point. You would have to ask them. A possible complication is that, since the checks were payable to you, you probably deposited them in your personal bank account, not the corporation's bank account. If either you or the corporation get audited, the IRS is not going to be happy about the income going to you but being reported by the corporation.
For the other payer, you will not get a 1099-MISC for the last 8 months. You will not get anything else instead. The corporation reports its income based on its own records of the income that it received.
