I would chalk it up to laziness.We definitely need clarification regarding the possible move to Guatemala as well as the order. Surely someone noticed the mistake (if there was one). Was it corrected? There has to be a reason that virtually every media outlet states that he's protected from being sent to El Salvador.
The document I saw (Respondent's Memorandum) says El Salvador. Maybe most journalists are taking the word of Garcia's lawyer.
This is a case when showing your sources (unless they are confidential, which I get) is a really good idea (especially in on-line journalism, where hyperlinks are possible). I have read the Oct 2019 withholding order, which clearly stated "Guatemala." I have not seen a correction which states "