Why is the following sentence a compound-complex sentence?

I can't believe that the school year is almost over, and I have so much to get finished, but I know that everything always gets done.

1.)It has at least two independent clauses.
2.)It has one independent clause and one or more subordinate clauses.
3.)It is not compound-complex.
4.)It has at least one subject and one predicate.
5.)It has two or more independent clauses and one or more subordinate clauses.