Need help in understanding the house sale contract

[Alok Singh]

Is a House sale contract in Illinois considered valid even if it does not have the "Managing Broker" initials and signature anywhere. Only the realtor has signed on last page.

I am having several issues with the realtor and I want to terminate the contract. I spoke to the managing broker but he is not letting me do it. I looked at the contract again and found that there are no initials of the "Managing Broker" on any page and no signature by him. Only the realtor has signed on the last page as I mentioned above. 

Thanks for help.