Micconceptions about salah

:sl:
I am a 15 year old muslim. Recently i started studying sahih bukhari which according to wikipedia is the most authentic hadith book. But the procedure of prayer in sahih bukhari is very different from what we do. for example there is a hadith that we shud lift our hands to the shoulders before bowing. Also there are many hadith about double bowings i.e qiyam. bow and then qiyam. Also it is mentioned that the prophet s.a.w finished his prayer with taslim????
Im confused :blind:
wat shud i do????