or was i misinterpreting the phrase seconds?
What they mean by the term "seconds" is that the batch did not meet military specifications. The mil specs are really tight though, so they may have been rejected for something as small as inconsistent velocities, or a slightly different "feel." For us civilian shooters it doesn't really matter.
with it being re-cased a few times?
Do you mean being reloaded a few times? I handload .223 and you can easily reload a case 5-10 times depending on if the brass holds up. I'll continue to load cases until I see a crack, and I'll pitch it.