What Century Is That?

I don't ordinarily highlight simple and obvious mistakes, but this one is rather amusing and unusual. Consider the cover of Jimmy Olsen #31:

Okay, so Jimmy's going to wake up in the year 2058, or about midway through the 21st century, right? Err, no, not according to the splash page:

Okay, so he's going to sleep for five hundred years and wake up in the 25th century or presumably somewhere around 2458. Got that? Nope, not according to the story itself: