Hi I've been trying to use the Syncing Spreadsheets to correct errors, but it misses some synced items and duplicates others. Is everyone else having the same issue?

I appreciate you reaching out, Dionne.
 

At the moment, we haven’t received any specific reports related to issues with syncing spreadsheets. However, based on the scenario you’ve described, I recommend connecting with our Live Support Team, as they specialize in the Spreadsheet Sync feature for QuickBooks Online Advanced and have the right tools to assist you further.
 

Here's how:
 

1. Sign in to your QuickBooks Online account and click on the Help (?) icon.
2. Scroll down, select the Contact Us button, and follow the on-screen steps.
3. From there, you can choose to either request a callback or start a live chat with one of our experts.
    

For callback requests, they are available Monday through Friday, 8:00 AM to 6:00 PM. For live chat, the team is available Monday through Friday, 8:00 AM to 8:00 PM, and on weekends, 8:00 AM to 6:00 PM.
 

You can also explore this helpful article for frequently asked questions and troubleshooting tips about the Spreadsheet Sync feature: FAQs and Troubleshooting for Spreadsheet Sync in QuickBooks.
 

Feel free to reply to this post if you have any other concerns. 

I've gone through various procedures with your tech team and it's still very glitchy. It deletes records, it added at least a day's work onto what I was trying to do and I can't rely on it working.  I would really like to use this facility once the glitches are ironed out, so if you'd let me know when that happens I will attempt to use it again.  In the meantime I'm having to do everything manually.

I hear your sentiments and appreciate your troubleshooting efforts, Dionne. I understand how performing multiple procedures yet still encountering the same issue can disrupt your workflow today.

Since you’ve already connected with them, they will follow up with you via call or email to provide an update and confirm whether your case has been resolved.

You may also consider contacting them again to check the current status of your case if you need further clarification.

Please don’t hesitate to reply to this message if you have additional questions or require further assistance.