Problems after being approved SSD

[beverly62]

I was recently approved for SSD after three years of waiting with an onset date of Nov 2006. At the time I first applied I was getting a check from workers comp for about $3000 a month. Two months after I applied I settled with WC with a lump sum settlement. It was noted in the papers that the settlement was equal to $189 a month, which would be deducted from SSD if I were approved. At that time I took the papers by the local SS office to inform them of the change.

Last week SSD deposited $3200 into my bank account. I was unsure what this was because I was expecting quite a bit more in back pay. I called SS and they said that it was back pay and they had deducted a large amount to offset the WC. They also said that my monthly check was only $158 due to the WC. Will they adjust this once they see that the settlement has been over looked?
I have been drawing long term disability for the last two years and am suppose to repay them once I receive the back pay from SSD. I have an appointment in the morning at the SS office to hopefully get this straightened out. What if I don't get enough back pay to repay LTD, will they just take what I get, or will I have to come up with the difference?
I will also be signing up my two young children for benefits, will they receive back pay, and could the LTD company take their back pay if I don't have enough to cover it?
Sorry for all the questions, but I never dreamed I would have all of these issues to deal with once I was approved.