The issue is that “the US is not America” is a very well known refrain and this was clearly a deliberate action. Confusion or not, they don’t care. It’s culture war 101 behavior.
If the name wasn’t a big deal they wouldn’t have named it “America.” It’s also hard to give any benefit of the doubt when this admin is so aggressive about changing the names of everything possible to include “Trump” and “America.” It’s clearly a deliberate tactic.