I'm new to I'm fairly new to premiere pro and I'm having a few issues. My main problem is that I'm using video clips filmed on an iPhone 7 for the first time so firstly I'm not sure if I needed to change any setting as I usually edit using clips from a sony camera. Secondly, I'm using proxies to edit faster because the lagging was unreal! This seems to work fine but when I turn the proxy toggle off the positioning of my edits change, clips repeat throughout and don't show any edits made to the entire sequence. Could someone please help bur please be patient with me as I'm new to editing and still learning.