@Traumflug nice catches, but I doubt this is fixing my issues in order-slip table.
@Occam To be honest, I also doubt, that your changes fix the problem at the root - as you don't respond to my screenshots, which obviously show that there are multiple issues... But as your contribution for sure improve things, why don't you submit it to github? Like that the changes aren't implemented... AND just modify core files is in my opinion even worse than overrides.