My apologies for the delay in responding to this ticket. It seems my email notifications have not been working so I was unaware of any new topics in this forum. It does seem that there are some issues since the WooCommerce zones were introduced. I am working on a 2.0 to work directly with the zones in hopes of making it more useful to this new feature. In the meantime I am trying to clear up some issues being experienced right now such as the blank headlines.

In regards to the unchecking of the box, I am currently looking into this. The same actually goes for saving as well. At the moment, you complete the action twice in a row, it will save after the second attempt (no refreshing or anything in between tries). I am not entirely positive as to why that is, but it should at least help you to modify the settings until then.

Thank you for your patience. I will be releasing the bug fix over the next day or two to include a couple fixes for WooCommerce 2.6+ and WPML users.