Do you think Jeff Andrews or Chad Knaus go personally pull all the parts out of inventory and lay them out for the crews to put on the cars? Do you think people at their level get involved in things like this? It could be and probably is as simple as somebody FORGOT that the winning engine out of the #9 was ineligible to be used in any car other than the #9. Yes, it should be and I'm sure IS somebody's job to double check this, but I work in a facility with about 10% of of the HMS workforce , and things get forgotten or fouled up a couple times a week.