"clearly states Anderson did ask for reenforcements to occupy the forts in Charleston, and this request was known by South Carolina. I believe that may have been the reason they moved on some of those federal installations even if Sumter was the commanding fort for the harbor."

This as with all things surely played a part. But Anderson stated that he was unable to take all the powder, munitions and stores with him from Moultrie to Sumter and left some behind. Clearly these would not be things that you would want to leave laying around. When not handled properly Civil War munitions kill even today, as we have read recently.