Ok D.E. Here are several different articles from various news sources saying it was, or it was likely Trumps side that sprung the leak. Take a few moments, look over them, and then let me know if you still think it was Mueller's team based on the poorly written tweet from Donald faking outrage.
http://nymag.com/daily/intelligencer/2018/05/why-were-muellers-questions-for-trump-leaked.html"Times reporter Michael Schmidt elaborated on MSNBC, seeming to confirm that the document came from Trump’s side (which makes sense because Mueller’s team has not been known to leak)."
https://www.thedailybeast.com/if-team-trump-leaked-muellers-questions-its-bound-to-backfire"First, who might have leaked these questions? Mueller himself or someone on his team could have done so, but Mueller is known for his tight-lipped approach to investigations. Not only is it against his nature to leak these questions, it is also against his interest. "
https://www.washingtonpost.com/news/the-fix/wp/2018/05/01/were-trumps-own-lawyers-behind-the-disgraceful-leak-of-muellers-questions/?utm_term=.cdfa4730c43e“Clearly a leak by the special counsel's office,” Sean Hannity declared on his Fox News show Monday night, shortly after the New York Times published the questions.
The rightful target of the president's ire might be his own legal team.
The Times reported that the questions were “read by the special counsel investigators to the president’s lawyers, who compiled them into a list. That document was provided to the Times by a person outside Mr. Trump’s legal team.”
Based on the Times's account, we can conclude that the leak did not come from the special counsel's office — unless Trump's lawyers shared their document listing Mueller's questions with Mueller's investigators, which would make little sense."
http://thehill.com/homenews/news/385602-muellers-former-assistant-says-grammatical-errors-prove-leaked-questions-came“Because of the way these questions are written ... lawyers wouldn’t write questions this way, in my estimation. Some of the grammar is not even proper," he continued. "So, I don’t see this as a list of written questions that Mueller’s office gave to the president. I think these are more notes that the White House has taken and then they have expanded upon the conversation to write out these as questions.”
http://www.newsweek.com/trump-leak-mueller-questions-experts-906857“There is no question that these leaks did not come from Mueller’s team but did come from Trump’s team,” ABC News chief legal analyst Dan Abrams said on Good Morning America. “How do we know that? Because in the New York Times article, they make it very clear this came from a list of questions that Mueller’s team read to them. And so Trump’s team created this list that was then leaked by someone outside of Trump’s defense team.”