Are you sure it’s not getting added in the right column notes? In the screenshot I think if you were to scroll down a little bit you would see the notes show up there.
We do have an issue in our GitHub repo already setup to move some stuff out of that right column and into any existing meta fields that WooCommerce offers. We’ll create some new ones, too, to make it a lot nicer to look at.
Again, though, I think those notes will be there, but just not where you’re expecting them to be. Look in the right column and see if they show up there please.
As for the issues with the proceed to checkout button, that is something that was affected with the WooCommerce 2.3 update and we’ve already addressed it in the development branch on GitHub. We’re just wrapping up final issues on the 1.1.6.3 milestone, and then we’re going to get the updated released which will tighten a lot of this stuff up. You can see that milestone already has 26 closed issues with 9 left to complete. We’ll get it done ASAP!
I’m going to close this thread for now, but just keep your eye on GitHub and look for updates which should resolve the issues you’re having. Of course, you can still respond here if you have more questions or concerns. Thanks!