Assuming you have no more than one reprocess per orderid/orderstageid query below should work. If you can have more than one reprocess per orderid/orderstageid additional logic is needed to sort out different reprocess items.
Hope this helps.
from order_history a
where a.orderid || a.orderstageid = (select b.orderid || b.orderstageid
from order_history b
where a.orderid || a.orderstageid = b.orderid || b.orderstageid
and b.orderinfo = 'reprocessed')
and a.orderinfo <> 'reprocessed'
and a.processdate >= (select c.processdate
from order_history c
where a.orderid || a.orderstageid = c.orderid || c.orderstageid
and c.orderinfo = 'reprocessed')