Yours is the first case I've heard of that has problems syncing a small number of records. Usually it takes a couple of hundred at least before the issue shows up.
Try this:
On each device unlink the library from Google Docs.
Go to Google sheets and remove every instance of that sheet.
Go to Google Drive, open the bin, find any file of the same name as the sheet you deleted, and delete forever.
On the device with the most up to date records, link the library to a new document.
On the remaining devices link to the existing document.
Hopefully this should fix it for you.