The port column was mapped from logical to physical numbering first and the
CPU label applied afterwards, testing for port 9. On an 8+1 board the SFP
port maps to physical 9 as well, so every entry learned on the SFP was shown
as CPU - on this switch that was 26 of 30 entries.
Label the CPU while the number is still logical, before the mapping, so the
two cannot collide.