You haven't defined what you want or where you fit, and companies pick that up as lack of direction. To combat this, develop strong preferences and be clear about what you want and what you don't want. You may appear too eager or overanxious. Your references are shooting you down. Be sure to give employers references they can relate to.
Engineers like to talk to other engineers, and attorneys prefer other attorneys.
You want too much money. Don't gauge your present worth on your last salary. Do a quick salary survey to determine realistically what you should be earning. Ask what the company plans to pay for the position. Then be flexible.