We recently faced something similar with Waywardson's job, so he started looking and landed a job he likes MUCH better. I agree that it's not looking good, if you've lost that many people that fast, and probably time to start looking.
I told my H that it's like dating, just because someone makes you an offer doesn't mean you have to accept it and I think that took a lot of pressure off of him. When he had an offer he was comfortable with, he accepted it.
Good luck in your search!