Reece - I assume it is still under warranty as the very first MK7 GTD/GTI demonstrators only showed their faces towards the end of June 2013. Get it back in and sorted under warranty before it is your cost to bear.
Hopefully cylinder 2 misfire is just a coil pack needing replacement. Leave the diagnostics to the VW garage if it still is under warranty, mcmaddy's VCDS cable was used to check a few faults on my car and although we didn't wipe anything, the VW garage denied any codes being present, as if the use of the cable had cleared codes (maybe the dealership was telling porkies).
