3 Nights Per Month MAXIMUM

I spent 3 days and 2 nights. Then departed. I spent the next night elsewhere then returned to Walmart for another night. I was not permitted to stay. As they had counted the days not nights. The security company writes down plates and really wasn't nor flexible. I am in town waiting for an appt and the security guard did ultimately advise that Home Depot after 11pm is unmonitored and ok to rest in. So tonight I am there.