I feel like we may have had completely different undergrad structures from reading your other comments in this thread. I took my CS degree in the CS department of a liberal arts Uni, and so had a bunch of optional arts credits to fulfill along with some amount of science and then a bunch of specific CS courses.

Having had a glipse of a CS degree that's part of another school's engineering department, I believe their structure is more rigid, and specifically detailed for 4 years.