the orientation of the crate does not matter when you make, trap, magic untrap the crate.
the only point in which it matters is when you want to actually use it.
i have 1 dedicated trap box maker on every shard and i usually make them 20 at a time.
then when i need to get one from supply i just pick it up and plop it in my backpack, if it lands in the wrong orientation then just drop it on the ground to the south, pick it back up and put it in your pack.
away you go.
also you want to get your skill as low as possible, so me personally i run 30 real and tali up (30 is the min skill).
you miss a little more but the pop of the box hits for like 1-3hp instead of more which in some circumstances could actually kill ya.
and dying to a trap box does not give the maker a count.
it hasn't been for about 20 years.
UOassist macros are perfect for doing this.
make a use last for the trap and target last then just hit the key until it takes, then move onto the next.