You're welcome Caitlin. By the way, an option was added somewhat recently (12.10 or 12.11) that allows the "Excel file" export option to add a new sheet to existing files.
So if you wanted to do this by automation, you could:
- make the 1st action export a query to excel file (to go on the first sheet in the excel file). Choose the "if file exists....overwrite" option.
- make the 2rd and subsequent actions export another query (to go on the next sheet in the excel file). Choose the "if file exists...add new sheet" option.