The so called "joint" statement that I read made nothing any more clear to me than what he said on Wed.  I read it over numerous times.  I'm a pretty educated person yet this still made no sense.  My take is that Mueller didn't write that "speech" someone else did.  His delivery was not normal/smooth and he had to read it off the paper.  If this had been his own words he wouldn't have needed to "read" it off the paper...IMO.