Still getting procedure wrong

Following last night's Eleventh Circuit benchslap, Judge Cannon sua sponte modified her order by excluding seized materials from those to be reviewed by the special master and striking two paragraphs ordering the SM to prioritize and make available to plaintiff's counsel the documents marked classified.

Two problems, I think. The amended order moots the 11th Circuit stay and thus Trump's appeal of the stay. The court of appeals only stayed the order as to the documents marked classified; since the order no longer affects those documents, there is nothing to stay. But that highlights the second problem--how does Judge Cannon have jurisdiction to modify the order? The government appealed the entire order, although it sought a stay only of the part related to classified documents (so it could continue the criminal investigation pending appeal). But if the entire order is in the 11th Circuit, how does Judge Cannon have jurisdiction to modify it? The unstayed portions must be complied with (i.e., the SM proceedings go forward). But the district court should not have the power to change an order that has left the district court and is on appeal--otherwise a district court could hamper appellate jurisdiction by repeatedly changing the orders in the case.

What am I missing?