Angst? Get fucked, tack. And if you can't understand how creating people and their characteristics and knowing ahead of time how those characteristics will lead them to act makes you accountable for those decisions, whatever. It's pretty obvious.
As for how it interferes with free will, here. You said you prayed to God and the prayer was answered. Therefore, I am assuming that without the prayer, you believe the bonus you received would not have been forthcoming at that time (if you don't believe this, then the usefulness of the prayer was zero). So your boss had no intention to give you a bonus 'of his own free will'. God intervened and made it so that your boss did give you a bonus. Explain how that does not interfere with his free will?
By the way since you've not been around and that conversation continued, I'd be interested in your response to this: http://atheistforums.org/thread-3113-post-183442
As for how it interferes with free will, here. You said you prayed to God and the prayer was answered. Therefore, I am assuming that without the prayer, you believe the bonus you received would not have been forthcoming at that time (if you don't believe this, then the usefulness of the prayer was zero). So your boss had no intention to give you a bonus 'of his own free will'. God intervened and made it so that your boss did give you a bonus. Explain how that does not interfere with his free will?
By the way since you've not been around and that conversation continued, I'd be interested in your response to this: http://atheistforums.org/thread-3113-post-183442