1. Stop dodging and just quote and cite where it clarifies that Barr, in his role working for the DOJ, could have gone against the OLC guidelines about indicting a sitting POTUS.
2. You still seem to be suffering from the "public confusion about critical aspects of our investigation" that Barr created.
Again, Barr spun it that because of the special counsel not "reaching any legal conclusions leaves it to the attorney general to determine whether the conduct in the report constitutes a crime", which is why people thought Mueller had punted, until they saw the actual report.
It was clear in the report that Mueller was following OLC guidelines that he couldn't indict a sitting president, and that coming to conclusion on obstruction wouldn't allow Trump the opportunity to defend himself in a court of law, but that the report "also does not exonerate him". He then said that "the conclusion that Congress may apply the obstruction laws to the President’s corrupt exercise of the powers of office accords with our constitutional system of checks and balances and the principle that no person is above the law". He obviously wanted congress to make the call.
And that is why Mueller wrote that March 27th letter (after talking with the department in person on the day Barr released his memo on March 24th, and sending a letter on March 25th, per what was said in the March 27th letter) saying that Barr's memo had created "public confusion about critical aspects of our investigation". In the March 25th letter he "enclosed the introduction and executive summaries for each volume of the special counsels report marked with redactions to remove any information that potentially could be protected by Federal Rule of Procedure... accordingly the enclosed documents are in a form that can be released to the public consistent with legal requirements and department policies." And that he then sent him that second letter on March 27
"requesting that you provide these materials to congress and authorize the public release at this time".
And Barr didn't do that. And then on April 9th he lied to Rep. Crist about it:
Rep Charlie Crist: "Reports have emerged recently, general, that members of the Special Counsel's team are frustrated at some level with the limited information included in your March 24th letter, Do you know what they are referencing with that?"
Barr: "no I don't."