Have you shot the gun since it was reassembled by the 'smith? If I read correctly, the hammer is following the slide on return to battery. That is certainly not a design feature and absolutely not the way my 1903 handles. Such a fault might lead to a failure to fire in a loaded gun, but could well lead to a full auto emptying of the gun. I think it prudent to get the gun running normally without ammo before you shoot it. A different 'smith is probably in order, too.
The owner's manual may be found at
http://stevespages.com/pdf/colt_32_&...hammerless.pdf, also at
www.coltautos.com. Not hugely helpful, but a start.