I have the same problem. I centred out the body to 0 on X. And transformed from 3d cursor which is set at 0 0 0.
As you can see some edges mirror but most don’t.
https://app.screencast.com/NNgp1YjYVffxI
I don’t need to fix this but I’d like to understand what’s gone wrong if I can
Still can’t seem to add images direct to posts
