If your report renders differently than you expected, check if you're using preview features.
On the File menu, look for a button labeled Disable preview features. If that button is there, select it, and allow the page to refresh.
If the report now renders as expected, leave preview features disabled for now. Otherwise, you can reenable preview features by selecting the Enable preview features button on the File menu. After 30 days, preview features are automatically reenabled, but you can disable them again through the same steps.