Second and the part that is most important, We build these everyday.
A person building these everyday is subject to a mistake such as to forget a torque process way far over a guy doing this seldom, the once in awhile guy won't forget that. The question in my mind is how your second guy missed the torque process and you must have had issues prior to even have someone checking behind your bottom end assembler. A competent engine builder won't need a check behind man nor rely on the customer to triple check.!!
I've been building engines for 20 years and repairing cars for my living and i don't won't ANY CUSTOMER checking/handling rods or main bolts behind me in any fashion or form.
I make a mistake every now and then. I can tell when it's my fault. There's a thing called "a stopping point". There's a reason for that also! Eliminates mistakes, such as this mistake!
I can look @ the Photos and determine that engine was new. You mention 2005 too much in your posts. To me that sounds like your excuse. Assembled in 2005!!
Still, it's your short block. It's still new
You can believe one thing. Your buisness will suffer b-c of this one incident. The WWW is a powerful tool. Very!!