That linked screenshot was not mine, though. I think that was gofer's. I never used that theme. Also my recollection of a demonstration GIF about this seems non-existent, but hell... 23000 posts, I can't remember all of them
(Oh wow, I passed 23k 3 posts ago!
)
I think the solution is simply having a second sync mode. Leave the current one as is (rename it, if need be), and add a new one that works properly and as we'd expect it...