Nice finds. Your Artillery button is from the Artillery Corps 1814-1821. It looks like AY 55B in albert's button book. Does it have a backmark? Maybe "Crumpton Phil"?
Finds like those are becoming a regular thing for you and I am still jealous of that dirt you dig in. My clay mixture dirt went from wet and softish to hard and earn it digging in just a week or so. Really awesome buttons that scream history!