Red triangles and exlamation marks means your game can't read the meshes. In other words, the meshes were not installed properly. 'Unrelated' npc's show up as exclamation marks, but they may not be as 'unrelated' as you might think. When you use a body replacer like CBBE, every female in the game will use that bodytype, so if the meshes were installed in the wrong place, you end up with these type of problems. It helps if you tell people how you installed CBBE. Did you do it manually? Use a mod manager like NMM or MO? A mod manager is usually the best way to go. Check your folder to see if the meshes (nif files) are there: Steamapps/common/Skyrim/Data/Meshes/actors/characters/character assets (go to CBBE mod page, go the files tab. Under 'main file' there's a little magnifier glass. Click on that and it will show you the content of the mod you are about to download and the file path and what all the nif files are called and where they are located.) Oh and speaking of dirty edits, everytime you run 'verify game cache' you will have to clean your masterfiles again with TES5Edit. Do not clean Skyrim.esm, only Update.esm and any other DLC you may have installed.