Armstrongs Auto Sales

We provided a Ford Ranger to Armstrong Auto Sales to sell for us.  It sat on the lot for about 3 weeks before it sold.  Armstrong Sales did not notify us of the sale and release the vehicle to the buyer.  When we noticed that the truck was no longer on his lot, we stopped in to inquire.  Armstrong Auto Sales stated that they sold the truck and that he is a licensed auto sales dealer.  We will need receive payment in 7 to 10 business days for the sale of this vehicle.  

We have the original unsigned Title in our posession. We have not received payment for the sale of our truck, we don't know where it is, & if it is insured.  We don't even know if it has been paid for.

This process for selling our vehicle was not disclosed to us when we signed the contract to have this company sell our vehicle.  

A few days after we delivered the truck to Armstrong Auto Sales to sell for us, we received a duplicate Title (which we did not order).  We will be contacting DMV to find out if Armstrong Auto Sales ordered another duplicate title and changed the address on it to go to them.  How else could they sell the vehicle?  Who signed the duplicate Title to release the vehicle to the buyer?