I really hope people don’t start using Google translate to mass produce translation files because we’ll end up with a lot of very poorly translated items. If you are serious about offering ready made translations spend the money and get it done by someone who can actually speak the language. You don’t have to use a professional translation service. Ask friends, family, students or other authors and buyers here on the forums.
You have to look at which category it’s in. If it’s not in the WordPress category it’s not a WordPress theme. I agree that the author should not be referring to a HTML template as a “theme”. Maybe that is something you should take up with Envato support as, intentional or not, it is very deceptive.
The only “Smoothie” item I can find here is a HTML landing page, not a WordPress theme.
The problem is that once you start offering freebies with purchases it essentially becomes a bundle which is against the rules. If it is not included in the download file and isn’t something used in the theme as a feature or extension then I do not think it should be allowed.
The most important thing is for you to draw a clear distinction between item support and customization and stick to it. Make it clear to buyers that customization is not free. This way if you still choose to do customization at least you are being compensated for your time.
You can help yourself out in the long run by making use of the item FAQ page, making sure your items are well documented and designed in a user friendly way, all of which will reduce support questions.
You could add the numbers yourself but then if you delete an entry because its no longer relevant or correct you would have to redo all the entries that are after it to keep the order correct.
This could be very useful. I’ll be giving it a whirl.
I use mantis bug tracker and just copy / paste the change log for each version.