Try it in OO writer instead. I've used it several times. Once the get the label typed in, select the letter sheet size, and the Avery 8167. Then click on the format tab, and do whatever you need to do. Then click on the option tab, and select Entire Page. Last, click on New Document.
If the font is not right (wrong font, too large, etc), edit the top left cell (it's the only one you can edit).
Then check the heip file. There are instructions for Synchronize Contents, which will apply changes to the top left cell to the entire sheet.