The order of the attribute modifiers that is shown in the item lore should match the order that is configured in the Editor. Currently, this is not the case because the merge operation converts everything to and from a Set.

This is not as easy as I expected: it looks like the minecraft client can also arbitrarily reorder attribute modifiers. It looks like the only solution is adding the HIDE_ATTRIBUTES item flag and including the attribute modifiers in the lore...