In addition Congress's power over the judiciary is limited to jurisdiction.
-----
Confusion, no. And as far as Congress' power over the judiciary, they CAN STRIP the judiciary's control over ISSUES as they see fit. So to imply there is nothing the Congress can do, is totally wrong. They can do alot.
If "issues" means "jurisdiction" I agree. To my knowledge it has never forbidden the Court to rule on any issue.
"In all the other Cases before mentioned, the supreme Court shall have appellate Jurisdiction, both as to Law and Fact, with such Exceptions, and under such Regulations as the Congress shall make." Article III, Section 2 paragraph 2. Now this appears to me to give Congress a lot more control over the Judiciary than it has ever exercised.