As usual, I am late getting into this!
My mother taught me to put them in forks and spoons up, knives down.
Food Safe taught me business side up all the time on everything.
School taught me to separate them into types in the baskets but didn't specify up or down
The catering firm I apprenticed at put them all in a dishwasher tray flat, rinsed them, put them trough the cycle twice, rinsed again and then separated them as carefully as possible as ends were everywhere!
At home I do spoons and forks up, knives down!
So I guess Mom won out on this one!