I think it is wonderful that a while back you had no assignments and now you have choices. It may seem to you that having too many choices is not a good thing and it can be daunting for someone who has difficulty deciding. Take it from me, I used to be the master of indecision.
What I have learned, particularly from my courses with Landmark Education, is to make the best of the opportunity of choice. You can weigh, compare, consider, analyze and still not be able to make a clear decision. In the end, it comes down to you - just choosing.
Listen to your heart - what will bring you the most enjoyment, peace of mind, satisfaction? For many people, time (working and travel hours) and money drive our decisions about working. What many of us do not see is a dollar or two here and an extra hour or so there will not really make a difference in deciding between job opportunities. What really makes a difference is how will you feel about your time while there?
Life is short - we don't know how much time we have - consider how wisely you are spending the time you are granted each day when you wake up in the morning, still alive. I personally have learned over the years that it is much more important to me to enjoy the 8 hours I spend 5 days a week on a job than to get home a little earlier or make a few more bucks. I am hearing that job 1 is not fulfilling - it is robbing you of your personal well being, sense of contribution, the need to be challenged, and opportunities for personal relatedness to your co-workers.
I hear your commitment to the agency and I support your idea of having an honest communication with them regarding this assignment. It would allow you to honor your commitment by giving them the opportunity to work something out that would not leave them hanging and mutually agree that this is not the assignment for you.
After that, I would encourage to powerfully choose. And the key to powerfully choosing is to do it after consideration, weighing, etc. Choose and then be satisfied with your choice. That will take something - like resisting the urge to doubt yourself and wallow in regret. Trust yourself, choose, accept it for whatever happens and then choose to make the best of it. Even with job 1 - you can powerfully choose it and choose to focus on what's possible rather than what's miserably so. Please PM me if you like more info how to do that!
mscat