Some players were having issues where they were unable to reschedule within 24 hours of declining a match. After some thought, I've decided to remove the 24hr rescheduling requirement entirely. Declining a challenge now simply makes you unable to challenge or be challenged for 1 hour (and uses up 1 of your 3 allowed declines).
I apologize for the confusion the previous rule seems to have caused. This should hopefully prevent similar situations from happening again.