In my entire 20 years out in the work force, I have NEVER heard of "debiting" and "crediting" my good work and poor work, tallying these up weekly to account for and to measure my performance.
Spank me if I'm wrong, but this is just plain weird! Is this "bossy" of yours a control freak or whaaaaaat??? I personally don't like this situation and I believe it's not contributing in a positive way - at all! The devil is in the details, and I think that this guy is trying to create a living "hell" for you at work.
Jewel, I suggest that you come up with a better way to track your work performance. Think of several options that focus on *Positive" work performance, not the negative and discuss these options with your boss. Make it clear that the "debit" and "credit" system is not conducive to a positive work environment and that you don't feel comfortable with this way to reward or penalize your work performance. Most importantly, you and your boss obviously have a huge communication gap that needs a major overhaul. Open, clear, trusting communication is the only way to have a happy and healthy working relationship. Sending an e-mail to you that says "Not Happy" is NOT the way a boss should communicate with his employee.
Who is this guy?

?? <<scratching head in disbelief>>
He needs to go to supervisor/manager remedial training.