I don't know exactly what was "returned" but the subpoena you posted is not valid for an obstruction charge. Nobody can "command" anybody else to provide everything on ... but not limited to ... a particular list, and then claim that certain items that were not delivered were somehow covered in the "but not limited to" clause. Also, the subpoena doesn't specify particularly the place to be searched, and the persons or things to be seized, which is a 4th Amendment requirement. Calling it a "subpoena" instead of a "warrant" does not change the requirement; the purpose is the same, i.e. to gather evidence for a trial.
... which now appears totally bogus, given this new perspective that you have shown. The subpeona (potentially) violates Donald Trump's 4th Amendment rights. I personally don't know the extent to which Donald Trump is aware of every single document he posesses or has under his control, and I don't know to what extent Donald Trump made an effort to locate the documents and respond to the subpoena. Yes, yes, I'm sure that you are going to claim to know all of this with the greatest of omniscience ... and I don't believe you.
Overly broad. Operative words: "but not limited to the following: " ... while missing any specification of location, erasing any validity to any obstruction charges.