Is there an incentive for a loan officer to stick you with a higher interest rate?

I've been waiting on a HARP 2 refi for three months and 12 hours before Bernanke kicks off QE3, ( which was unknown to me at that time) my LO calls and trys to get me to lock, having worked with him for months and forgetting to keep my guard up when dealing with people you will never meet in person i agrred. The rate desk was closed and it didn't get accepted. I read over night about the Fed announcement and was expexting him call the next day to discuss locking again and the impact of the Fed's announcement which looked very positive from what I read , so I was going to wait till the end of the day to lock. He locked first thing in the morning without calling me at a rate and lender credit that is not good., then was " unavailable " at a Doctors appointment the rest of the morning.That afternoon after Bernanke's talk the market dropped substantially which every other person involved with mortgages was aware was going to happen apparently. Why would he have done this? What options besides walking do i have to get or wait for a better rate without starting over? Is there a thirty day wait to do another rate lock?