During the World Cup there was mention of last man red cards might not apply if the foul resulted in a penalty.
I think it's something to do with the seriousness of the foul play?
I can't be bothered researching this as anything to do with football authorities threatens my blood pressure, but it appears we may have been hard done by.
Cormack could gain some much needed respect by calling out the SFA on this and paying the resultant fine himself but.....