Multilingual site
In your list of features it says that your Classipress theme is compatible with WPML.
"Great if you need your ClassiPress site to be displayed in multiple languages."
This is not true if you want all ads to be visible regardless what language you choose as a visitor.
The text in the ad doesn't need to be translated but it should be visible even if you select a different language for the site.
The ads can't be duplicated manually to other languages because the images added to the ad can only be used in one of the language versions. Very strange behaviour...
This is a problem for many of your customers so why don't you help us instead of blaming WPML?