Very confused about my acceptance

So I was accepted to OSU and I applied for Computer Science and Engineering but I was put into Science and Technology Exploration. Does that mean I am behind compared to the other engineering students? Can someone explain to me what that is and basically the process that I must go through to be where I want to be.

https://engineering.osu.edu/academics/admissions

“Students who enter EXP as freshmen are retained and graduate at the same rate as students who enroll directly in degree-granting programs”

http://exploration.osu.edu/admitted-students

You are not behind. There are a lot of sequential courses in engineering, but you can fit them in starting in EXP as long as you place into calculus. Have you taken any AP or dual enrolled courses yet?