G-Spot's right I'm afraid,
They say that in the past 15-20 years the machine has only come back different on about 1 or 2 occasions and even then probably due to spoil rather than machine error.
Your £20 ensures that the paper is marked by hand but it is extremely unlikely you will get anywhere. I suggest buying 20 Lottery tickets instead, you stand a better chance of winning
Last months remarks are not due to the Marking machine. It is not clear what it is though.