these show as 108 in the game (info screen on purchasing and information (encyclopaedia) screen (108) but
not on the front (8 shown here as it always has been - the 1XX or 2XX is ignored there). They happily load 81mm mortar sections. Tested in 1995. (using the OOBs I have, info line shows April 2007).
Unless you have found some unusually fat mortarmen perhaps?
. The problem would seem to lie with whatever mortar unit you are trying to carry, anyway (>8 men??).
Cheers
Andy