I do all the things you all recommended, I just grabbed the wrong Winchester container when returning the powder back to the container. I feel good that I realized it as soon as I started screwing the lid back on the container. It now has a large label on the container, DON'T USE, MIXED POWDER!!!
Since I have over 20 lbs of powder on my shelf, including plenty of 231 and WST, this will be set aside to next spring to fertilize my wife's flower bed.
It really is NOT good fertilizer and you will run the risk of "burning" up your Wife's flowers, and that is worse than losing 1lb of powder

Pour it in a pile and torch it. It's fun, goes up really really fast!!.