Time to quit the job and lab time.

I thought when I started school that I would be able to work on the weekends however the problem with that is my wife works in the evenings Saturday and Sunday whereas I worked during the day. We knew we would be busy, passing each other at the door but after a semester and a half of competing for study time I'm calling it quits.
I really do not understand how BSU comes up with the class crediting. I'm taking chemistry 105 which is 5 credits and Anatonomy Physiology which is 4 credits both which have a lab that is three hours long. The chem lab is worth 2 credits you do the lab, take an easy pre quiz and you're done. The Physiology lab is worth 1 credit and and is a class in itself. The amount of work required does not compare to the chemistry lab whatsoever.
This makes a difference if you are trying to balance your schedule because these labs start to add up and essentially are another class themselves. In my opinion somebody needs to evaluate the credit system for classes with a lab based on workload.