Hello Laura,
When you do something to Revit it commits a transaction (i.e the things you can undo with Ctrl + Z) - Dynamo lives within the idle transaction thread of Revit and bundles all the work you do up into one transaction per run.
However, pending on the graph in question, you may need to force end and force start a new transaction.
I don’t have a good test project to play with, so haven’t been able to test this, but please try the following amendment to your graph (I’ve put in the nodes and colourised them appropriately):
Sheets to DWG and apply template.dyn (103.9 KB)
If this doesn’t work - then play with combinations of Transaction.End and Transaction.Start in your graph.