Nigerian man discovers he graduated with a second class upper five years after carrying around a second class lower certificate

A Nigerian man has narrated how he discovered that he graduated with a second class upper, five years after carrying around a second class lower certificate. 

@Tarykuh said he made the discovery after getting his transcript from the university he graduated from. He tweeted; 

I found out today that i graduated with a 2’1 after five years of carrying this 2’2 certificate around. got my transcript today and it carries 2’1, did the math and it mathed. well done, university of ilorin