They are GTC orders. Nothing more. You can place an order for the DAY or you can place an order GOOD TILL CANCEL. The GTC orders are removed at the end of the day and then reapplied at the start of the next trading day. The seller doesn't remove them. Its nothing at all to do with manipulation. (Hope this helps)
AVZ Price at posting:
30.5¢ Sentiment: Buy Disclosure: Held