Obviously the resistor pack should have been inserted the correct way round and this should have been caught during testing, so apologies for any error there.
I don't know what Rev-Ed processes and procedures are for in-house and sub-contracted work but will pass on this information.
I did test the new AXE091 version and did not find any problems when testing. I suspect this is a component insertion problem but I cannot say if this is a one-off problem or more wide-spread. I am sure Rev-Ed held stock will be checked as soon as possible.
I don't have a latest AXE091 to hand but on the version I have, the SIL is the one next to L1 and LDR. PCB silkscreen shows a circle at the pot end and a dot marked on the SIL lines up with that circle, 0V - Is that the same with your version Hubsy, and how you now have it to work as expected ?