I got enrolled in a course twice... NEED HELP!!

I'm working towards my university admissions. So, basically last night I bought a new course (SBI4U), For some reason, I didnt get to enrolled right away and it was under review, which was weird because when I enrolled with SCH3U and ENG4U, I was able to use them right away. Today, I got an email that I got enrolled but I got 2 emails from them, and when I checked got 2 SBI4U courses on my dashboard. I didnt know what to do and I dont wanna do SBI4U twice, so I transferred 1 of the SBI4U to MDM4U and I got enrolled. Did anyone experienced the same thing and what happened afterwards? Please help.