For anyone who is still having trouble with this issue, I found this article that helps provide a solution. I hope it helps!
http://software.kirknessassociates.com/blog_files/9c91c7ada28c024f95a26f1ac8a8d620-25.html
Might as well add my two cents here as well, to show Airtable that there is a sizable market of users for whom this is an issue. I’m a solopreneur with third party contractor-partners that I’d like to give collaborator access to simply edit a few rec...