That's because almost all major transactions have come to a halt. An idling car consumes a lot less fuel than a moving one.
If the true value of Rial had risen, you'd see more economic activities and a general decline in price of goods and services. As of right now, Iran's economy is at a stand-still and the conversion rate of Rial is completely meaningless.
The effect of sanctions is yet to come by the way.
Yeah 11200 could be bought today.. some thing it's the government lowering to force people sell, others realize there's no business with pricy dollar.
I think somewhere in between, don't doubt they may run it to 13000 area again but long term I still believe there is downward pressure.