Hi Judy,
Products can only be listed in one category and one sub-category. If you would like the ability to assign products to multiple categories, I would suggest creating a new checkbox type custom field (you can even name it “Categories” if you want) and assigning your products to the appropriate values accordingly.
When you save your custom layout, unfortunately there is currently no visual indication that it has saved. The page does not reload and nothing changes in URL bar. To make sure it’s saved, what you can do is go to another area in your WordPress admin (e.g. Pages) and then come back to the custom product page builder. Then you’ll see if it has actually saved or not.
One of the things that might be happening for you is that, if you click “Restore Default” then it will actually add a command to the URL to initiate the restore. However, if you then click refresh, it will automatically restore the default again, even if you’ve made changes and saved, because it is still in the URL. This is why we suggest to navigate away from the builder and then back after restoring, just to make sure you don’t accidentally do this.
If, after doing this, you find that the page layout does seem to be saving (i.e the elements you added are still there when you go back to the layout builder), but that elements are getting automatically rearranged, this is because we have been experiencing some issues with the layout editor and certain elements resizing and jumping under others when they’re saved. We have found that if you insert a “Blank” element just to the right of a specific element, it will prevent it from incorrectly resizing or moving.
For example, if you put together the layout that you want, will the editor let you add in another “Blank” element to right of everything? If so, doing this may help to keep everything else in order when the layout is saved.
Alternatively, because of some of the inconsistencies of the custom layout, we have created a “Tabbed Product Page” layout. It includes all custom fields, you can add and remove tabs and choose what elements are shown, and it is fully responsive, meaning it will display correctly on all devices. This layout can be selected in the “Premium” area of the “Options” tab.