Why do you think they need to be remailed in New Jersey?
You do know this sort of thing is normal - it happens all the time! Single-piece rate First-Class Mail pays the highest price per pound - it gets poor service.
But you knew that didn't you?
The terrorists thought this stuff would all be delivered Monday or Tuesday.
It wasn't!
Because the letters received by Dashchle and others had New Jersey postmarks. If they had been sent from Florida they would have had Florida postmarks. The Boca Raton facility was only one post office to have been contaminated; the others included D.C. area facilities (postal worker deaths) and NYC.
I'm not following your reasoning here.