One thing that kind of throws me is Jeremy (in FNaF2) worked the week of November 12 in 1987. But it's supposed to be a summer job. Supposedly, the incident that occurred to start the investigation mentioned in the game was the murder of the two kids (which made the count five). But that was supposed to have taken place on June 27. (This can totally be explained away if the check wasn't given to Jeremy until way later due to the restaurant closing down.)
But then Purple Guy died in the restaurant from the first game but I have no idea how he would have gotten there if he was arrested in 87.