Not sure what the autozone people were doing, or what was wrong with their machine... but, the reason I decided to get a new battery anyway, was because all of the symptoms pointed to dead battery or alternator, but a v8 turbo deisel engine couldnt even jump it, (it wouldnt turn over) so instead of getting an alternator first, i decided to get a new battery first. Anyway, it was the proble, and now i dont trust autozone's machines ! lol
Oh, and i had already cleaned the terminals... and I'm not entirely sure how the test said it was good, all I can think is that their machine was messed up for some reason. (it is supposed to load test and charge it at the same time