Long Week holiday

I was supposed to take guitar classes weekly once, but last two weeks i could not take lessons because of bad weather. so i was practicing the same old tune (although i could not perfect that). Apart from this, i learned a bit music theory and bought a musical tuner (yes, this is a must).

Why do i need a guitar tuner:
Each string in guitar is supposed to make sound at a particular pitch (or what ever).
but because of various reasons, temparature, humidity, weather (or cheap strings)
each string does not make sound which it should. so we should tune it before start playing. So, you switch on the tuner and pluck a string. the tuner will tell whether the string is speaking truth or not (There are many videos on youtube to explain this) i will not cover this.
But, i will cover an issue which i faced with my tuner and i could not find any help at other places.

Problem: i switched on tuner and played E-High string and tuner is supposed to say whether i am above or below the regular level. But, the tuner shows that i am above (or below) of some other tune rather than E-high (say G or F) i thought the tuner mistaken the E for F or G. but, later found that the string is miles away from the regular E. So i need to tighten (or loosen. by trail and error) the string more than a simple adjustment.

But, any way i manged to use it some how.

After the regular practice, i also played E-Minor, E-Major and A-Minor.
But i could not distinguish between E-Minor or regular strumming of all strings.

Sunday came and time for the class.