Invoice not pulling through correctly from shopify. it is shown within 'data' section of connector, but does not pull through as a 'sale' in QBO. All product info correct

This behavior is indeed strange, keptlondon. 

Most of the time, unusual behavior caused by your browser becomes full of site data or data integrity issues. To rule this out, you can open your QuickBooks using an incognito or private window. This can help us rule out any cache-related issue that might've caused the problems. Use these shortcut keys to open it: 

• Google Chrome: Press CTRL + Shift + N.
• Safari: Press Command + Shift + N.
• Mozilla Firefox: Press CTRL + Shift + P.

If the steps above work, I suggest clearing your browser's cache to boost browser-related issues. Some stored data on your browser can impact the data being transmitted, thus causing some unusual responses. 

Incase private browsing doesn't work, I'd recommend using different browsers. They'll provide you the best and most secure experience with QuickBooks. For more details, please see this article: System Requirements For QuickBooks. 

Additionally, you want to categorize your transactions to ensure your book is accurate in QBO. For the step-by-step guide, you can refer to this article: Categorize transactions in QuickBooks Online. 

I'll be around whenever you need help with QuickBooks. Have a great day!