Double Dark Side! Diesel & 8P
Could be more then just 1 coil pack. If you don't know the history of all 4 coils I'd change all of them for genuine ones. A remap will always highlight weak coil packs.
Also as Dre said, it could be the coil pack wiring.
Best thing to do would be to find someone with VCDS/Vagcom and scan it. If its a coil pack you'll have an error pointing to a misfire on a specific cylinder. You move the coil pack from that cylinder to another, clear the code and then see I the error follows the suspect coil pack.