Another Drop-Down list issue

Hello all,

I am encountering a small issue when using a drop-down list in a Visual Composer Model and apparently so is everyone else!

I have created an input form and linked the output to the Variables node on a backend data system query object. The drop-down list is matched to a characteristic in the query and, when initially selected, shows all of my available choices. After selecting once of the choices, however, only that option is available for selection. This causes an obvious problem if I want to rerun the form with different parameters.

I also have a general question. How would one allow for multiple entries from the drop-down list? My drop-down list is for different geographical regions, and the reporting can be based on one or more regions at a time.

Any help would be greatly appreciated and points will be readily rewarded for any helpful leads.