Fog 2, Cirrus 1 is indeed correct
This is a Canadian speciality.
The conventions used are the same as in the Canadian hourly observation on the Surface Weather Record. That particular part is described
here as column 40. Although it says that
F (not
FG) is fog, the convention used in METARs seems to be
FG. Fog seems to encompass mist for the purpose of the RMK.