Not unusual at all. The number is based on a survey of employers, and they don't all get their responses in on time. This month's +59,000 was about average for the net revision.
How does a survey provide accurate numbers for total jobs created? As a manufacturer, I've employed 14 folks for as many years. Demand is so great, my backlog of orders so huge, I've had to hire two men in July and another in August. These are permanent, full time positions. Having never been surveyed, these numbers won't be known until I file quarterly payroll tax reports at the end of October.
How do you miss 36,000 jobs?
If I remember right New Mexico accidently counted all the teachers on summer vacation as "unemployed" which greatly increased their numbers last week