We all need to have methods & good habits to safe guard ourselves against things like this happening. I tend to move items to be immediately used to where I want to mix them with name side of product facing forward, then move them over slightly 1 by 1 after pouring them as an extra safeguard.
I have yet so spray something I completely put a wrong product in or skipped a product, But I have thrown out several things in the past when in doubt. I also put magic marker marks on my mixing containers highlighting the 4to1 slot or whichever I'm using and many times the intended height I'm filling to just to help prevent an oops.
I know this thread was basically about a recovery effort, but figured I'd throw that in. Unless you're dead or something , life always presents the opportunity for even the best of us to screw up, but we can keep it to a minimum with habitual safeguard practices.