Just by way of an update, Porsche Germany have agreed to renew the warranty on my car despite the apparent engine destroying recordings in range 4 5 & 6. Annoyingly they won't admit that the single instance recordings in each of the higher ranges are most likely a software recording glitch

For the record the DME report is below:

Range 1: 995 / 1128.000HR
Range 2: 115 / 1126.400HR
Range 3: 2 / 983.200HR
Range 4: 1 / 442.200HR
Range 5: 1 / 442.200HR
Range 6: 1 / 442.200HR

Operating hours 1132.800

I took ownership at around 820 operating hours so have had a range 3 - or not as the case may be!