Anyone have or know about Winchester model 1200 12 gauge problem?

I bought a Win. 1200 12 gauge at a gun show for $200. When you push the relese button it feeds and ejects the shells just fine, BUT when you go to chock the gun to shut it, it feeds 2 at once, all of the shells would come out at once if there were room. I took it to a fancy gun store/gun smith place and they want $45. just look at it, I belive its a standerd problem and anyone who knows about guns shouldent have an extra charge included.So any help would be very great. The gun is clean, and quality ammo is being used. thank you ELDON

Hi Eldon,

That sounds really expensive just for looking at it. I'm sorry that I have no other ideas.