Here's a few ways I have handled this situation in the past:
1) The printer creates a second front plate for the ballot which does not have a back (stripping out the VBS message).
2) If VBS language is not prescribed by law, consider creating second header for use on this style with wording such as Vote Both Sides (If Applicable) .
or 3) Add message This Side Intentionally Left Blank to backer.
I have seen all of these work in California. Hope it helps you in FL.