As I saw here ( and is also confirm by my situation) problems with date difference seem to be in octomber, november and december. In the first nine month of the year the date is the same ingame and in Genie Scout.
Same here
Genie date: 03.02.2015
FM Date: 18.10.2015
It is my only safe file so far. Tried to save it a couple times and load it again. But the Genie date moves a couple days but nog as much as the 7/8 months difference between them.
EDIT:
When I proceed playing FM and i am ingame at 31.10.2015 the Genie Date states 17.02.2015 so it looks like the date is off, but will progress with a 7/8 months in between.