The definition for cron: The cron command is the clock daemon that executes commands at specified dates and times.
Allows execution of commands without user intervention. Similar to the task manager in Windows.
You are on a shared server and there is a limit to the number of users that can connect at one time. I've never experienced this but it's possible.
Second, have you opened a Help Desk ticket to report the issue?
I'm on Road Runner and the local hub has 5 domain servers that we connect through. When I moved my companies site I saw the new site the same day. The next day it was the old site. And it kept switching back and forth for a week.