I've been republishing my jobs to various job boards through Zoho such as LinkedIn, Indeed etc.  They keep posting for 30+ days on the job boards.

I've tried taking the job postings down for 1 -2 days

Changing the date opened to today's date

Updating the job description.

Older jobs I have not had posted in a while posting with the current date.  How long do jobs need to be off the job boards to post correctly?