Boom. Great find.
On the downside, I guess we'll never be able to prove that the subpoenas exist now.

BOOM great excuse to never have to prove your premise.
I was being sarcastic, as anybody who is capable of thinking both logically and honestly can ascertain that the subpoena exists without having to see an actual copy of the subpoena. Unfortunately, you apparently don't fall into either of these categories. Not much I can do about that.
ANY subpoena has basic legal requirements to be enforceable. This is not because of what jurisdiction they were issued from but because that is what due process requires. Part of that due process is a filing of the subpoena, certifying it, and serving it. That means as standard procedure public records are generated, ones which you should easily be able to produce, but can't.
No, it doesn't mean that. This is your unfounded assertion. At least you abandoned your incorrect application of the term "court of record."