I think my printer is broken!

I had to print out a paper for school and I noticed an odd problem.  When I picked up the stack of pages, they were all backwards!  The last page (number 5) was on top!  Why is it printing backwards?

Because your printer is retarded like you.

UPDATE: I printed something else and it still happened.  Only this time, it was 100 pages, and now I have to go through and sort every single page.
Is there any way to fix this?

"Because your printer is retarded like you."