An order sustaining a demurrer without leave to amend as to some of the causes of action is not appealable, although it can be challenged in an...

It sounds to me like you're misinterpreting a judgment against you as a judgment in your favor. If you're the one who filed the cross-complaint,...

No. In small claims, there is no appeal from the outcome of an appeal hearing (which is a new trial before a different judge).

Yes, that is a correct expression of what it means.

Yes, a defendant can challenge a restitution order on appeal, unless the defendant waived appeal or did not object in the trial court to the amount...

No. There is no provision in the rules of court for an "en banc" hearing in the Court of Appeal.

A summary judgment can be appealed, just like a non-summary judgment.

No, only a court can file a writ of mandate. But you can file a petition asking the appellate court to issue one.

1) Generally, one time through the state appellate courts. 2) No.

What you're missing is that being erroneously held on a previous case has no bearing on the merits of the new case.