There are several problems in your script.
1) You are using Enter Find Mode (Restore) which will use whatever find settings inside that step. Delete it and use an Enter Find mode with no restore.
2) Use Set Field rather than paste and set your lead filter into a $_variable using Set Variable.
Set Variable $_filter to xxx
Set Variable $_date_range to today & "..." & today + 7
Enter Find Mode (NO restore)
Set Field Lead Owner to $_filter
Set Field Action Due to $_date range