Problem with Clevite bearing

Just a heads up. I rebuilt a sb a few weeks ago and ran into a problem with new Clevite Bearings. When I installed the main bearings in I just happen to notice there wasn't an oil hole drilled into one of the thrust bearing. I checked the bearings package thinking they have packaged two many thrust CAP bearings. I kept the original bearings so I checked to see if the upper thrust bearing had a oil hole and just as I suspected it did have. I'm thinking that two thrust CAP bearings were installed in the package from the factory because the package had never been opened. I was shocked to discover this. These bearing are suppose to be the best.
Had I not noticed this my new rebuilt engine would have lasted about five mins.
Guys keep your eyes open for things like this because it would be real depressing to have to pull an engine out again because some nit wit made a mistake.