Glad you got it all sorted in the end.
I'm pretty sure I haven't got this Oil Level/Temp Sensor on my 07 Leon, been under the car a few times and never noticed it.
However, if I look on the VCDS Measuring blocks like you have been, I too get an Oil Temp of -60 and a flickering Oil Level.
I'm going to have a look at Channel 39 when I get home to see if I can find anything out on there.
I'd love to able to view Oil Temp, I was going to fit a gauge, but I sooner have it this way.