Using a combination of forums, guides and videos I was able to piece together mostly what I needed. I now have two files for Dawnguard. GamerPoets states when there are two files for the different cleans and nefftd states I need to clean Dawnguard twice. Do I need to save both for this or just to most recent one?
https://youtu.be/eYg_kl2RrZY?t=1m56s - GamerPoets
https://www.reddit.c...beginners_guide - nefftd
Disclaimer: Dawnguard's master file should be cleaned twice. Follow the instructions as per the video, and then go back and clean Dawnguard.esm once more. The issue is benign, but there's no harm in it and LOOT will continue to warn you about dirty edits if you do not.
Also not 100% sure but couldn't find it mentioned anywhere. Do I have to clean the Official Highrestexturepack.esp files?
Steam - Up to date
Skyrim - Cleaned and up to date
Loot - up to date
IE - up to date
TES5Edit - up to date