With how tough grading has become and because I can't see if there are any wrinkles/creases, I wouldn't be surprised if that card graded a 1 to a 2.5.
I've seen some nice looking 1's, until you tilt it to show the crease.
For your sake, I am hoping a 3 or 4, but I will be surprised if it received either of those grades based on the cards condition.
With that being said, however, it could be one of those anomalies where the grader was in a good mood and you got a 4 to 5?
Edit: Check out this Aaron in post #32
https://www.blowoutforums.com/showth...1500860&page=2