A Compromise and Release is a contract between you and the WC Insurance to release all liability for a lump sum payment of money. However, your narrative is all over the place. Perhaps you and your Attorney need to have a meeting to discuss all your issues, because you sound like you are fairly uninformed on the status of your case.
We offer general concepts, but you should give ALL your facts to a licensed Attorney in your state before you RELY upon any legal advice.
As stated in previous posting: If the judge signed an order approving compromise and release IT IS FINAL. Unless there was another order vacating the C&R. If you had the surgery after the judge OACR YOU WILL BE LIABLE FOR THE EXPENSES OF THE SURGERY.
There is no one who will explain this better than your attorney.
In Missouri, the employer/insurer is liable for interest for failing to timely pay a settment or judgement. In Missouri the states WC division has a fraud unit that goes after insurers that fail to meet obligations.
I think we are all a bit confused by your posting. I think you probably ended up confused by what your attorney told you. I would strongly urge you to schedule an appointment to sit down with your attorney and go over the situation. Your attorney is the one who understands what is going on in your case.
A Compromise and Release is an agreement. You agree to accept compensation and in return, you release the insurance carrier of liability for certain issues. You should discuss the particulars of your compromise and release with your lawyer.