How are settlement amounts determined in Avandia class action lawsuit as I hear almost half have been settled and it seems bad news for victims?

I have had this suit for4 years and still no settlement. I didn't start talking to an actual lawyer until about a year ago, and they didn't give me any answers. I finally got a letter for they said after every attorney which was passed down from attorney to attorney in the last 4 years was getting half of my payoff and my payoff was less 14,000. So, I signed the papers just to get it over with. Now they are saying Glaxo is keeping more than half of that for so called liens. Which I have never went bankrupt or could afford a house, so absolutely no liens. That's what I have been through!