They would have to have a case against you for fraud before they could go after you for any payments they've made to you, I believe, hon. So as long as you haven't knowingly told them any lies or misreprsented anything, you'll be OK. So relax.
They do this sort of thing all the time. I think they do it just to get the lawyer more time so they can increse their kickbacks when they do award you more money.
As you can tell, I don't have a lot of respect for the SS beauracracy. So much of what they do seems so capricious and arbitrary.
Hugs and lots of love,
Dan