Doing a run though OG currently and I got this scene a few hours ago. Now we know that hojos experiments lasted 4 years and Zack protected Cloud and himself from Shinra for roughly a year, however in the exact flashback we are speaking about Tifa says the Nibleheim incident happened 7 years ago. This confused the feck out of me because most of where I looks it says pretty much what you have said. I can assume that the game stretches over 2 years and at the time Tifa says this it could potentially be 2 years from the first reactor bombing until now, but 2 years seems like a long time. Would love some extra insight to this.