Hi, 

I'm newbie here, very sorry if my question just a standard question and everyone knows it. I have two questions:

FYI, just bought electric guitar.

1. Should I replace the originally strings from the shop that came with the guitar?


2. When I've done tuned my guitar properly using tuner then I played the guitar for couple hours and I just curioused when I heard the strings tone it feels alright/properly but when I tried using my tuner just for checking, the 6th string for example should be E but it changed to G (using tuner). I'm just wondering if the tuner is wrong or the string is wrong (I'm using cheap tuner - Aroma) or both wrongs?

Thank you gracefully for some advices🙏