Any disturbances should have been noted by the invigilator, and the panel will take these into account. How much weight they get is another matter - it will probably depend on how serious they were. (If they were serious, one might expect other children to have been affected as well.)
There is also a discrepancy in the 1:1, 2:2's etc as our Son's grade was not listed on the accumulated sheet for the entire class. Can you shed any light .......?
Not really. This could happen if for some reason no recommendation was made at the normal time (late October/early November). I suggest you ask the LA representative when you are invited to put questions.