Welcome to FlyerTalk,
Bhaiyyu.
While there are a lot of features at ExpertFlyer I like, I can't make useful sense of their Fares, and they just about never match reality. I don't know where they're getting them from, and I don't how they're supposed to be used. (The info Expert Flyer gets in general is the kind of info that goes to travel agents, but travel agents may know about rules for determining actual fares, while Expert Flyer displays raw Fares information, which doesn't typically make sense to me. So I just ignore it mostly.
The one thing I use EF Fares info for is to figure out which booking codes (K L V S G etc) are lower fares for a given airline and which are higher fares, so that I can make sense of the Availability page (which may not always sort the codes in order of decreasing price). The main thing that causes fares to change from day to day or week to week or whatever is fare code "buckets" being used up or being reloaded. If I'm interested in tracking fares on EF, I have to learn which fares seem to correspond with which fare code "buckets" by comparing Availability on EF with fares on Kayak.
FYI, the main thread for ExpertFlyer questions is in the Travel Tools forum (in the Travel & Dining, as opposed to Miles & Points, section of FlyerTalk):