Flashing with TWRP issues

view story

http://forum.xda-developers.com – So I've been reading that people are having issues with flashing a ROM using TWRP. They factory reset, wipe etc and when they go to flash...nothing there to flash? How can this be avoided? I have ZV8 rooted and unlocked with free gee from the app store. Sent from my LG-LS970 using xda app-developers app (HowTos)