Kwanro:
Birth Date: 1990-02-21 Age: 20 (Korean: 21)
Zero:
Birth Date: 1990-02-18 Age: 20 (Korean: 21)
If the birth dates are correct, they should be 19 for about another three weeks, right?
Perhaps it's a faulty algorithm or something, I don't know. Maybe there are more errors, I only checked a few players. Just thought I'd point it out, so it can be corrected.
Cheers!