MoonWolf
The new Inland and Auto Ordnance carbines have a break-in period of about 300-400 rounds. The more you fire them during those first 400 the less problems they have with jamming. I just went through this with a new Auto Ordnance carbine. Experienced it with several Inlands also.
Every few hundred rounds check the bolt's right lug for deformed metal from impact. Also the rear of the bolt where the hammer strikes, You may not see much until several hundred rounds.
Regarding your serial number, Gun Genie is owned and operated by a large distributor, Davidson's. When they order from a manufacturer they normally order more than a few to have stock on hand. Yours may have been amongst a large shipment ordered in the past and they just got to the one with your serial number.
Jim